I could not really work on the fuel tank because I am waiting another 24 hours for the proseal to cure from Jim and my marathon session (where we slammed 4, countem 4, ribs into the right fuel tank). Since the shelf paper masking for the ribs was less than a rousing success (it left adhesive residue on the ribs) I decided to mask the last three ribs with the tried and true blue 3M painter's masking tape. It went on easy.