Can You Put Varnish Over Polyurethane. There is a spar polyurethane, which is what you should use on the item in question. You don't have to remove all the varnish before you start painting. When painting over polyurethane is important to provide.
You can paint over a surface of polyurethane varnish if you prepare it properly.
Polyurethane will not bond or grip well with the lacquer and will peel off over time with general use. For most of them just reseal the can tightly. But although they're often referred to interchangeably, each one has distinct uses and offers varying levels of protection from environmental elements. Improper techniques can lead to your paint finish to fail; The hardest part is painting over varnish, lacquer or other top coats and getting it to stick! Polyurethane and traditional varnish are two popular finishes that cure into durable protective coats when applied. Varnish over shellac (dewaxed for poly varnish) is a very common feature of many finishing schedules where the shellac is needed to separate materials. This means a durable top coat is a critical part of building quality projects.
