This works. take two old soft cotton pillow cases an place tank inside and put bubble wrap over the entire tank use duck tap to hold in place . Make suitable opening at filer hole. Put two cups of nuts and bolts in tank, seal tank with duck tape. Jack up the drive wheel , make sure is not equipped with posi traction and is a automatic. Use m/c tie downs attach tank to wheel, spend a little time doing this, if you like the shape of your tank. Have a driver with foot on brake before starting engine and placing in gear, control pin wheeling speed of tank with brake. After you are satisfied liner adhesion is gone, remove tank for final step. While all protective covering is I place ,clean tank by hand,then with a high pressure washer at the local car wash , might need a L shaped nozzle to get all the crevasses.