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Self etching primer bonds well to bare metal surfaces and can be top coated in a short period of time. Epoxy primer can be applied in heavy coats which can be guide coated and block sanded to remove small imperfections in the body. Epoxy primer takes longer to dry (cure) before it can be sanded or top coated.
Is self etching primer the same as epoxy primer?
With epoxy, you can lay it over just about anything, body work, sanded paint, metal and you’re going to be fine. With Self-Etch, if put it over different layers of paint, if put on too wet, it’s going to lift because Self-Etching primer has acid in it. Epoxy can be more expensive, but then again….
Is self etching primer required before applying epoxy primer?
It bonds very well and makes a good surface to which paint adheres well. You can us it on top of self etching primer to build up to a level surface. You need to have a dry, very clean surface before you can apply epoxy primer. It comes in two parts which need to be combined and mixed before they can be applied.
What’s the difference between primer and etch primer?
A zinc-rich primer should be used as part of a heavy-duty, high build, two-pack system. Etch primers work by acid etching the metal surface. Whilst the etch primer should be sprayed to ensure a thin, even film, the topcoat can be brushed.
What is the purpose of self etching primer?
Self Etching Primer is a rust preventive coating that etches and primes in one coat. Self Etching Primer features an advanced spray system that allows you to spray at any angle, even upside down for those hard to reach areas. A comfort spray tip with a wider finger pad reduces fatigue caused by continuous spraying.
Do you have to sand self-etching primer?
In any complete restoration or body repair project, you will to sand primer at one point or another. However, most manufacturers of self-etching primer, due to the acid base of the products, don’t recommend directly sanding the self-etching primer.
Can you paint directly over etch primer?
You can’t paint directly over etch primer. You need a surfacer or other primer/sealer over it.
Can you use epoxy primer over self etch primer?
We suggest using a Urethane Primer over the self etching primer as a barrier between the self etching primer (Do not use Epoxy over Self Etch). Urethane primer can be top coated with most coatings so you will immediately eliminate any worries of adhesion issues with your top coat.
Can I use etch primer over body filler?
You should not put etch over or under filler either. If you are applying it before prime and you get a little overspray on your filler work while trying to hit your metal it will be fine. Dont make a point to spray it over filler though. Etch is for adhesion to metal, nothing more nothing less.
Can you spray base coat over epoxy primer?
Base over fresh epoxy is the best way to do it. Reduce your epoxy 1:1:1 so it is a thin “sealer” coat and it lays down texture free. Sand to atleast 320 before epoxy sealer.
Is etching primer necessary?
Etch primer is good but not necessary as long as you get rid of the light rust first.
Can you brush on self-etching primer?
Apply one coat evenly by brush, roller or spray, after proper surface preparation. Avoid over-brushing and over-rolling as Etch Primer is quick drying. Do not thin for application by brush or roller.
Can you weld through self-etching primer?
This unique self-etching primer formula has organic binders that replace conductive heavy metals such as copper and zinc. These organic binders will burn off during the welding process, leaving a corrosion-resistant self-etching primer for paint prep. Compatible with MIG, TIG and Arc welding.
Can I use self etching primer on plastic?
I would not use an self etching primer on plastic as it will sink. (it does on car bumpers anyway). Try and get a plastic primer (available in any autoparts store here). Give a VERY light dusting of this (A standard aerosol can can do 4 or 5 car bumpers easy) and let dry.
Can you paint acrylic over etch primer?
1k etch is designed for use with acrylic paint ONLY, you shouldn’t use it with a 2k primer it will eventually fail and your paint will peel off, this is because acrylic paint never fully cures and ‘moves’.
How long after etch primer can I paint?
The can says you must wait “at least 30 minutes.”Jul 7, 2009.
Is etch primer epoxy?
Filler and etch primer are both porous, epoxy is not, so epoxy provides a moisture barrier right at the metal where it’s needed the most.
Does body filler go on bare metal or primer?
The short answer is filler companies suggest it needs to go on bare metal, and epoxy companies suggest you put filler over epoxy so they can sell more of their product.
What primer do I use over body filler?
Urethane primer (2K) Urethane primer is the most common primer used in auto body and restoration by far. It has good solids and fills well. It is easy to sand and can provide you with a perfect body when blocked properly. Care should be taken when applying it as to not use too much.
Can I use epoxy primer over paint?
Epoxy primers have excellent adhesion properties and will stick to bare metal, paints, primers and fillers. This means you can hit an area with epoxy primer that’s been sanded down to bare metal, repaired with body filler, and then feathered into the original paint.
Do you have to sand epoxy primer before top coat?
Thank you in advance! The re-coat window of epoxy primer only needs to be followed when you intend to apply another coating without sanding to from a chemical bond. If you scuff the epoxy you can apply another coating that will form a mechanical bond with the epoxy.
