I'm going with the poly if they will let me change my order since it hasn't shipped or processed yet. I also ordered some of the woven roving corner tape 6" wide so I can do all the corners and seems. I got 50 yards. I'll make sure to do all the corners first and see what I have left over after that. I also added a topcoat hardener for the gel coat just in case it doesn't want to cure out right. It was cheap so I'll have it just in case.