Is it okay to use commercial grade white pigmented shellac as a primer for oil and possibly acrylic paintings?
Also, what about plywood as a support? Is there one type, i.e. birch, that might be preferable. Finally, a question about painting over old paintings: Can I use white pigmented shellac for this? I paint in oil and use Liquin as a medium, so the finishes are of often kind of glossy.