Fuel tank slosh sealant

[Duncan Grimmond]

Hi Ruairidh, that sounds interesting. Is the outside tinned as well when you get them back or is it just internal? Does he have a bath of molten tin/solder to do his radiators in? I have a lot of scrap pewter which is almost pure tin but I can't see how I could exploit it without serious investment in melting/handling equipment.
I'm jealous! Obviously much more specialised than my attempts.
There is always an answer...