We pressure tested the gastank and found 2 tiny leaks that Aad
fixed by TIG welding them. Removed all the rust from the inside
of the tank only to find that new rust was developing after
a few hours, so we coated the inside with an industrial coating
that I got from Kees
Vink in Warmond, who claims it is used in aircraft tanks.
Thanks Kees! Now the tank is finally ready for paint.