Care of petrol tank

[cdsdorset]

You can convert the rust easily with phosphoric acid, cheap to buy online. When it's cleaned you can use various things to lightly coat inside, wd40 etc.

[shottsj]

I would second the reverse electrolysis method.
I had spent an absolute fortune getting the Super Rocket tank re chromed and professionally painted only to discover the inside covered in rust just inside a few years later. It was my fauly for leaving it half full of fuel for several months while it was not being used. I did not want to damage the immaculate paint and chrome so used reverse eletrolysis. It worked brilliantly and cost pence.

Hi Dean! I just a acquired a nice running A65 Thunderbolt but it needs some TLC. The tank has a slight dent in exactly the wrong place so it will need rechroming after repair and then painting. Can you recommend the people who did your Super Rocket tank.  Always best to use someone tried and tested.
Cheers,  Jeremy Shotts (returning to BSAs after long break and new member)