Past experience with spot putty and red auto body filler has been that it will absorb water and swell if exposed to it. Most are polyester based with nitrocellulose filler material, although I dont think it would be a problem, it is definitly not as durable as epoxy with fillers. It also tends to be very soft and heavy in relation to epoxt thickened with micro ballons or colloidial silica.....try it but be careful.....Mike

> Has anyone used red nitrogen putty (auto body type) to fair small
> imperfections before painting. I have grown tired of the endless cycle
> of filling and sanding using epoxy, but would like to paint to a very
> glossy finish. I'm using MAS non-blush epoxy, Interlux Brightsides
> one-part polyurethane paint with Interlux primer. The nitro putty
> is cheap, dries fast, fills small imperfections well and sands easily
> (on cars anyway). Will the paint (primer) adhere? Is it too soft?
> Any other problems?