Can Urethane Be Applied over Lacquer?
Covering the Finish Second, Polyurethane Is Not the Best Choice for Painting over Lacquer Finishes. Polyurethane Will Not Bond or Grip Well with the Lacquer...
Can you spray urethane over lacquer?
Generally the only thing you can shoot over lacquer is more lacquer. That cheap primer should come off with lacquer thinner. Once it's all off clean the bumper real well, scuff it with a maroon scotch pad and shoot adhesion promoter and a sealer over it. Then you should be good to go.
Can urethane be applied over varnish?
If you mean a polyurethane varnish over a traditional resin varnish, yes, you can. However, it is a good idea to scuff-sand thoroughly and get the sanding dust off before doing that. In addition, to be more sure about adhesion, coat the surface with a dewaxed shellac and then coat with the polyurethane.
Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.
