This roll paint project aint a good idea if you have a short attention span.
After the Evercoat, I did 2 coats of white primer, then sanded. Then I did 2 coats of sealer (Bullseye 1-2-3, the Tintable kind designed for dark topcoats) to serve as a barrier between the water based primer I inadvertently used and the polyurethane, oil-based top coat paint I have.
So I am sitting around getting ready to sand the sealer this evening -- you know just to get out any orange peel and make it a nice smooth surface for the topcoats.
I didn't think much of sanding the sealer because the guy who did the white corvair w/Rustoleum had apparently sanded down his primer before topcoating. Me, I was thinking: "Primer/sealer, what's the difference? you just want a smooth surface for the topcoats."
Well, according to some forums, "Sealer" is an "animal" different from primer. Some suggest that when you "sand" sealer, you effectively "break-the-seal." So you may not want to sand it.
I am kind of on the fence on this one. But I am probably going to end up leaving my coats of sealer "as-is" and just get on with the topcoats. May not be quite as smooth or could be ok and I actually find that the unsanded Sealer provies a better bond with the topcoat paint.