I have my cp made out of 3/4 in mdf and want to protect the top and am wondering if there is anything other than lexan or Plexiglas that I could put on it as I don't feel like recessing holes.  Preferably a spray of some sort.  I have 2 joysticks  and a trackball that I am worried about.  as of now my trackball is recessed so that It rests flush.