I just did a pewter-casting workshop for my friends, with wonderful
and enjoyable results, except for the clogged files that I now have.
Is there a chemical fix for this problem? Or can I melt it off? I
normally have just one file I use for pewter, which I rake out with a
piece of brass sheet. But I’d love to find an easier way to clean the
pewter off of the set of needle files that I let my friends use. They
are a real mess. I use these coarse needle files for some of my wax
work, so I want to restore them. Can anyone help?