No, you don’t must strip from the poly before painting. (Fortunately. That will be a huge pain.) When the coating is very shiny and slick, I'd sand the doors evenly very first just to be certain the spackle has anything to grip. The DecoArt stain blocker isn’t genuinely a primer http://troyhslaq.theobloggers.com/2586129/the-greatest-guide-to-best-brand-of-paint-for-kitchen-cabinets