Can You Spray Polyurethane Over Shellac. Even the back of the shellac can itself says not to use polyurethane. Varnish over shellac (dewaxed for poly varnish) is a very common feature of many finishing schedules where the shellac is i was taught as a rule of thumb , you can put anything over lacquer but not to put lacquer over anything. Do you need shellac first?
Varnish over shellac (dewaxed for poly varnish) is a very common feature of many finishing schedules where the shellac is i was taught as a rule of thumb , you can put anything over lacquer but not to put lacquer over anything.
Lightly sand the shellaced surface to remove any gloss, then coat with the polyurethane. And you can apply shellac over other coatings, such as, for example, polyurethane. Polyurethanes came onto the market in the late 1950s or early 1960s. Shaking a can of polyurethane will introduce numerous bubbles into the product that will show up in your spray poly goes on just like spray paint. One of the favorite materials used for wood finishing and floor finishing is the polyurethane. Whether it is varnish, shellac, polyurethane or polyacrylic polyurethane creates a durable as well as clear finish, resulting in no yellow tint. They cure and become no problem, though it's still good form to shellac over them first unless you're. Do you need shellac first?
