BSA 441 board tracker, sealing the tank
This would be soooo much easier is the bike wasnt the tank :)
Mix up the sealer..
Pour in plenty o sealer
Spin, tilt, and move around tank (frame in this case) to get everywhere inside..
As it becomes thick, after about a half hour of the the tilt/spin game, drain off the excess, and clean threads in petcock bung.
Then wait a few hours and.........repeat.