Gas tank cleaning
I add a gallon of lacquer thinner and slosh it around and let it sit overnight and slosh it around again, dump it out and add another gallon of lacquer thinner and slosh it around again and dump. If the thinner comes out clean, your done. If not add another round of lacquer thinner. When satisfied install the sending unit with a sock at the end where the tube filter is to help in any filtering that may still break away from the tank. I have done two tanks this way and never had a problem with either tanks. This is also a good reason to fill your tanks, now and then, to help coat the tanks.
