Self-Etching Primers
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Question: I use urethane primers and I keep getting swelling marks in areas that I used Body Filler and Putty. Raw body filler will also cause loss of gloss and swelling.
If you ever had a chance to read tech sheets for urethane primers, most manufacturers mention to finish off the body filler or polyester filler with 180 grit - 220 grit sandpaper.
Remove tar and grease with Wax and grease remover of your choice before sanding.
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Automotive undercoats, primers, sealer and body shop supplies available to order online. Remove by grinding or sandblasting until all rust is removed. Wheel Alignment
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It's a two-component primer, so it's simple to mix, and provides the optimum blend of paint adhesion and corrosion resistance and protection. There is a big misconception of the label on these primers that say "Extra High Build Primer" or "Ultra-Magic Fill" and makes it sound like there is a miraculous ingredient in the can that is going to fill all the scratches left on the body repair.
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This is generally an automotive primer sealer, like urethane or epoxy-based. Tire Equipment
Once you've completed the sanding and other prep, you'll want to make sure the vehicle's surface is as clean and free of particles as possible to allow for better contact.
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Some are a few hours; others need several days. Ratchets & Drive Tools
This goes for any plastic parts as well.
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Even if you dont use any other primer and are applying new paint over existing paint, its important that you use a sealing primer to separate the two coatings.
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Futures: at least 10 minute delayed.
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Sand surface with 180 to 220 grit dry and re-clean surface. The Angry Dorito: John Deeres rotary engine, The coolest tractors that didnt make it into Interesting Iron in 2021: Part 2. Screw Extractors
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What is causing this problem?
Mixing: Mix 1 Part MP550 Primer with 1Part MA505 Activator. In regards to automotive body repairs, you should be using a gravity feed gun with a 1.4 mm fluid tip. The solvents that are used in the basecoat systems are very strong.
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The final step before applying a coat of paint should involve applying a coat of sealing primer, or sealer.
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If you're needing a best all-around primer, something that provides a little corrosion protection and allows maximum paint adherence these will be some of your best bets: For large paint jobs - in instances where you need to repaint/refinish a large surface area of your vehicle, epoxy primer will usually be your best option. Epoxy Primer - Epoxy primer is considered a good standard base when it comes to ensuring the auto paint bonds to the metal and promotes a quality paint finish.
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Again, a coat of epoxy primer over the top will serve the purpose. Others, like urethane primer, can require up to 4-parts mix ratio, but easy-to-follow instructions are provided.
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What is a mil?
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Urethane sealer doesn't really have any filler capabilities, but is perfect for when you're painting a vehicle that's already in decent condition or you need to seal off a good amount of filler or bodywork. Air Tools & Compressors
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The problem is deciding what type of primer you need, especially when you consider the number of primers available.
We pour some good grade lacquer thinner into the cup and wait a couple of days. Conditioning Discs
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The solution to this problem is to finish out the body filler with 180 grit and fine polyester putty, This will speed up the process in the paint shop, save materials and increase the quality of the repair.
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Self-etching primers have to have another primer over the top of them or the paint wont adhere.
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A plastic wrapping that seals a cigarette box is approximately one mil thick.
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A unit of length equal to one thousandth of an inch.
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Equally as important, auto paint primer helps prevent rust and moisture damage to your vehicle by adding a couple of extra protective layers.
I identified three types of swelling problems and solutions: One type of swelling is from the 80 grit or even 36 grit scratches that were not taken out completely.
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I don't think you should have to apply more than 4 wet coats of primer over a repaired area.
You can immediately see the sand scratch swelling in about 2 to 5 days depending on the temperature. Paint & Paint Guns
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The second type of swelling is the markings of a map.
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Acid etch primer is much like urethane surfacer in that it's forte is not so much corrosion prevention as providing a strong bonding surface for paint.
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If metal surface is badly pitted or rusted, the rust must be removed. Touch-Up Paint Bottles
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The best results were established when the smaller tip sizes were used. Fans
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Give your vehicle a quick wash and spot clean any areas you may have sanded or ground down with a wet rag.
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The body shop and consumer are rewarded by having no lose of gloss, no shrinkage or swelling, delaminating or cracking.
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Enamel Primers/Sealers - Enamel primers are a extremely economical and, much like epoxy, provide a good base for auto paint to adhere to.
Otherwise, you may find rust popping through the surface down the road.
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Begin by determining which needs are most important when it comes to repairing or repainting your vehicle - will you need extra rust prevention?
Polyester Primer - Polyester primer has what's known in the auto world as excellent "build" - it fills small scratches and dings much like a putty or filler would and has the highest filling capability of any sprayable primer.
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Since urethane is only a primer surfacer, youll also need to apply a sealer before you paint. Auto Body Supply reserves the right to change the terms and conditions of this agreement at any time. Repair Order Racks
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Urethane Primer Surfacer - This type of two-part primer surfacer is often used in conjunction with any putty or fillers you're using to perform repairs and is applied over a secondary base primer as it doesn't provide the best corrosion resistance.
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Filler primer paints are basically formulated to fill in any pits in the surface from sanding or rust even quicker than an epoxy primer alone.
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We recommend you use the MP-2K Urethane Primer. Evercoat
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Acid Etch Primer - Another good, basic car paint primer.
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Like everything else, paint continues to evolve with new formulations and chemistries.
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First and foremost, automotive primer helps the paint adhere to bare metal.
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Only one good coat might be necessary.
In the automotive world, the term primer generally refers to a paint-like substance that's usually applied to freshly sanded metal before the topcoat.
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There are several reasons that can cause this but let's break up the question into two parts because you may have two different things going on.
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If you're just performing small touch-ups, brushing the primer on by hand will definitely work, and you'll want to use smooth, even strokes to avoid visible lines in the end paint job.
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If you need to apply more coats, I would stop, let the primer cure for 24 hrs, block sand with 220 grit and re-apply the following day.
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If you're performing any type of bodywork, repairs or paint updates, you'll need to use primer at some point.
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Once you've applied the auto primer, curing time will vary between types, so make sure you read labels and instructions.
This will allow you to block sand the primer and still leave enough film build to protect the feather edge from solvent attack.
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Recommended for protecting bare metal, galvanized steel and aluminum, MP-550 gives medium film build to help eliminate imperfections and can be lightly sanded. This document has a digital date stamp and is monitored on the internet.
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This is an ongoing change as spray gun technology changes. Parts Handlers
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If you have to use a scuff pad then use sanding past in conjunction.
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It is designed to become a strong, durable, chemical resistant coating.
Most auto body primer types come available as "two-part", which means a primer base and an activator need to be mixed before use.
This closes the surface and prepares it to accept a coat of paint.
It cant be an epoxy primer, but it can be a urethane primer.
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If you're making small body repairs and need to sand down or grind out a blemish, it's important to protect that area and make sure the paint will bond with the surface in order to further damage from rust or peeling.
Moisture Cure Urethane Primer - This auto primer is excellent for both paint adhesion and rust protection on difficult repair jobs where complete rust removal is unobtainable, making it an excellent all-around primer choice for completing two jobs at once.
In most cases, the filler primer or high-build primer is also a urethane product.
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Do not attempt to fill the DA 80 grit marks left over because these half circle marks will also swell.
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Remove by grinding or sandblasting until all rust is removed. Mirka
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Prime aluminum and stainless steel within 72 hours, and prime bare steel immediately after cleaning. Closeouts/Overstocks
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Some may even go as coarse as 120 grit.
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Is strong paint adhesion a priority?
The situation isnt much different when repainting a classic tractor, where the foundation comes in the form of one or more layers of primer. H&S Autoshot
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The third is there may not be enough primer covering the "bust through" feather edge, always apply primer at least 4 to 6 inches past the feather edge.
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Urethane primer is about 50 times better.
Always apply products according to the manufacturers recommendations. Dry time is quick as well, making this a great all-around auto primer for home mechanics and auto body shops alike.
Polyester auto primer is perfect for completing small auto body repair jobs and is excellent for spot repairs.
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Matrix MP-550 Self-Etch Primer is a two-part primer that chemically protects against the corrosion process.
Whenever you're dealing with bare metal, whether old or new, you'll need to use primer before covering the area with any automotive paint. Pulling Posts
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They look like straight lines embedded in the paint film.
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This is a tough question because there are too many variables, The type of paint gun and fluid tip size will determine the usage in a big job. Screwdrivers
Some manufacturers may recommend a 1.8 mm to a 2.0 mm fluid tip depending on the solid content and viscosity of their primers. Since lacquer primer never cures and is made up of talc and thermoplastic resins, it absorbs the solvent instead, therefore causing lose of gloss to the topcoats followed by paint swelling.
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Stir it and it will be become a liquid state where again, and depending on the resin that was used, you may be able to apply it back on the car.
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Deciding which type of automotive primer to use doesn't have to be overwhelming or confusing.
Contact us to help you troubleshoot your primer choices, or browse our entire selection of automotive primers and paint supplies. Liquid Wax
Urethane and Epoxy primers are activated and go through a thermosetting stage.
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The average body filler at 70 degrees cures at 16 hrs.
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They have a fair to good level of corrosion resistance. Shipping Policy
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Surface preparation: Remove tar and grease with Wax and grease remover of your choice before sanding.
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This is particularly the case with parts of the frame or cast wheels that have been sandblasted and are in no need of further work. Parts Handlers
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The larger tip sizes were hosing on too much primer, even if you wait to apply the next coat, the top would skim over and trap solvents underneath.
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As always, allow the vehicle surface to dry completely before applying any type of paint or primer. Hex Keys
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Aluminum and stainless steel MUST be sanded with 150 to 220 grit dry sandpaper even if a metal prep or self etching primer is used.
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You should have at least 3 mils of primer left over after block sanding to protect the body filler or busted feather edge from solvent attack. While it might seem like adding an unnecessary step, using car primer paint when refinishing an auto body is important for a number of reasons.
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Primer. It also cures quickly when exposed to the moisture in the atmosphere, so curing times are cut roughly in half.
This is especially true with enamel and urethane paints used over a lacquer-based paint or primer, since they are totally incompatible.
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For small touch-ups - polyester primer surfacer is perfect for those little repair jobs that require some light filling or putty, as it has great "build" - meaning it's on the thicker side and has the ability to fill in minor nicks and scratches and sands down well, negating the need for an extra putty or filler step.
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The other problem I saw was too much material would accumulate in body creases, eventually causing bubbles along the middle of creases, natural body indentions, around door handles and moldings.
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Without primer as a buffer, the shiny metal surface, whether old or new, won't bond with the paint well.
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This leads to peeling, flaking, and eventually rust, which turns a driveable car to junk in no time.
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If you use a DA sander with 80 grit to feather edge, be sure to finish and completely dissolve the 80 grit scratch with 180 grit or 220 grit.
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If you follow the steps in Question 4, you should not have to apply more than 4 coats at any time. Work Carts
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This may require more coats than other panels.
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But I have seen better results with the shops finishing off with a fine polyester putty and 220 grit finish.
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Variables may include gun stroke speed, fluid tip size, use of different air pressures, is a fast double coat = one coat, and so on. Tire Racks
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Lacquer Primers/Sealers - Lacquer primer dries quickly and sands quite well, but can lead to cracking and bubbling in the long term, so these auto paint primer types are best used beneath a corrosion prevention and paint layer for small bodywork jobs.
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All though the price tag is an attractively inexpensive cost initially, the side affect causes a transparent high cost and many shop owners never even notice.
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We will continue to add more of your questions as needed.
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One coat of primer yields about 2 to 3 mils per coat.
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