Ok, so, you see, I don't like polyurethane by itself. It either is too thin of a coat, or it feels too much like plastic if I put "enough" on. What I wanted to do, was instead, put on a coat of shellac, then use a spray-on polyurethane can to put a thin layer on to protect the shellac. This is going on a desk. The wood I'll be staining will be a half-inch piece of particle board glued to a half-inch piece of oak plywood (I have no idea how to build a rounded edge, so I assume it's easier if the wood is exactly one inch in thickness). I'm going to be staining the side that has the oak. If this is possible, what kind of shellac and what kind of polyurethane should I use?