Primer-What's your opinion

[Igofastr]

No pro here, but epoxy is very stable, inert, and works well to prevent any solvents of the undercoats and topcoats from influencing each other/bleeding through.

On a bare metal resto, it is comon practice to apply an epoxy primer to the newly cleaned/exposed metal, do the body work with filler, followed by highbuild primers, then go back and seal the whole mess again with epoxy (sometimes thinned a bit).

Tough stuff.

[DanEC]

I recently read a how-to article in Auto Restorer on painting a Cobra and he did shoot the raw body first with epoxy, then high build and then with epoxy as a final seal coat. His explanation was that it sandwiched all filler within inert epoxy primer and prevented any possible reaction by something coming through the fiberglass. It makes sense but typically you need filler in low areas and in the initial blocking of the body your not going to take the gel coat off in low areas - except where you grind down seams. Might make sense to spray a coat of epoxy over the prepared mold seams prior to starting filler work. However, his article was published too to do me any good.