Cleaning the insides of old fuel tanks

[Keith Webb]

I tried the caustic soda - which I think would work but be a pain to remove... I managed to get most of it out using boiling water, then while the tank was still warm (and the tar soft) a couple of washouts with petrol.
I hope to hook it up tomorrow to see whether it's OK.

I like the idea of the broken glass - just wear a mask when blowing out!