expoxy primer on top of existing primer

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borna428

Promoted Users
Hi all ,
I have a new car floor panel that is already coated with some kind of epoxy primer from factory. I am sure is not the best primer, therefore I am planning to re-coat it with SPI epoxy primer. I applied some paint remover on it and it didn't come out, therefore I am thinking to sand it down.
Now the question is should I sand it to the bare metal before applying the SPI epoxy primer on it, or just scuffing it up is sufficient enough before applying the epoxy primer?
 
I think the rule here is wipe it with a rag with thinner,if it don't come off,scuff it and prime.

That's of course for a floor.Outside body panels should always be stripped.
 
NextGen Classics said:
I think the rule here is wipe it with a rag with thinner,if it don't come off,scuff it and prime.

That's of course for a floor.Outside body panels should always be stripped.
Click to expand...
I wiped with acetone, gasoline, paint thinner, paint stripper and and is not coming out, however dulled the gloss on it. so is ok to scuff and prime it?
 
The goal is to remove gloss for the next coat to stick, hopefully the spi seals it all up. Most of the reasons people take it down is not trusting if that epoxy on it was painted over sketchy metal. Even if it was run on an ecoat line, if the crane stopped after the hot cleaner before it was rinsed, it can flash rust. If there was rust on it before the cleaner, it was not coming off or being converted, just covered.

If you see any area, bumpy, loose, possibly different gloss or pattern, at least take that spot down to bare metal.
 
Your test proves its epoxy, and that means it is proper to sand and epoxy.
Many high-end shops strip without test as their name is on the line with the final job.
It's a tough call, and I can't argue against it either way.
Of course, we trust that the e-coater is prepping the panel in a clean room and in perfect conditions.

This and 50 cents will get you half a cup of coffee, maybe!
 
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