Had my first bout with fuel tank pro-seal today. Overall not too bad. The key was careful preperation of the work area to allow for rapid application and cleanup. Learned a few little tricks and kept the first work session pretty small. I need to work on a better filet the next time around. Also, the AN-6 rivets that are used to plug the fixture holes are WAY too long. More than 1 or two hits and they will bend over and damage the rib. Had to drill two out before I figured out how hard to hit these things.