I am working on my 1972 C-10. I just had the frame, radiator support, and lots of miscellaneous piece's sand blasted. I have SPI black epoxy and SPI black single stage paint. I read that you can leave frame and under the hood pieces in epoxy, but I prefer a shiny finish. If I spray 2 coats of epoxy and 2 coats of paint is it likely that it will have a smooth finish without sanding the epoxy before painting? Also, how long do I need to wait between the last coat of epoxy and the paint?