Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hi all,

I obtained some surplus PCB material recently which was pre-coated
with some sort of photo resist. The coating is red/orange coloured
and in poor condition. My question is, How can I get this stuff off?
I have tried acetone, alcohol, soap & water, citrus cleaner and
Shellite (a hydrocarbon based solvent) all to no or little avail.

Anybody recognise this stuff and know how to remove it?

Thanks,

Morris