Hi BB,
Just a quickie, on your web page when you say boiling in caustic what exactly does this entail, from what I understand caustic is not the sort of stuff you really want to boil, also I know you have mentioned it before on here but which acid do you use? I have an old plastic central heating header tank which looks like it will accommodate my rostyles which are in a bad way as well, thought I might give it a go.
Cheers
AL