Getting ready to pro seal fuel tanks. Cleaned skin with actone and taped off were I didnt want pro seal to get on. Pro seal mixed 80 grams and rivets cleaned in actone. See Pic #2 I used methond #2 and installed all the ribs on the bottom side, then wrapped skin around and put in the fuel tank jig were I installed clecos in the top side of the ribs. Worked great.