Okay, we've got everything filled now and we're ready to sand the front to even out these little imperfections that occurred while we were putting the case together. I'm going to use a belt sander on this. You can use a palm sander if you want but it takes forever so a belt sander works well. The key to this is going to be to hold the sander flat and not to let it fall over one side of the board or fall over the other and especially here where we sanding two boards that are mating. Be careful not to go up and down and cause a little gap here. So we're going to start at the bottom, sand this and go all the way around and sand everything flat.