After pulling all the staples and the stock vinyl, I marked a line of where the foam really stops underneat. If you don't make a reference point you might end up cutting all the way though the foam.
I dre my approximate area that I wanted to cut down. I ued a serrated knife to cut it close to my markings......after I cut the excess foam to my liking....I smoothe all of my cut marks down with a disc sander using 80 grit discs.
