/diy/ - Do It Yourself

Im building a workbench for reloading and other /k/ related activities. I have decided that i want to build the bench and then place some old vintage magazine advertisments on the workspace and then put some sort of clear coat over them to work on without ruining the paper ads while sealing them in. Would polyurethane be the way to go or is there a better sealant that will hold up better? Its not like the workbench will be seeing tons of abuse, but it will definitely be worked on a lot.