Free Jewelry Making Tutorials: Salvaging & Reusing Hardened Precious Metal Clay
Anyone who has worked with precious metal clay and is reading this post is probably having flashbacks to that moment of dread when your clay unexpectedly hardens while you off doing other things. Months later you return to play with your metal clay, open up a package, and it's as hard as a rock. Alternatively, maybe you created something that didn't work out as expected, and before firing it, you want to reuse the metal clay and make it into something new.
Depending on your working style and the types of things that you make, you can reconstitute and salvage the hardened metal clay back into something useable again. It's not the same and has some drawbacks such some extra waste and it's kind of sticky; however, the good news is that you don't have to throw it out. It may be more of a challenge to work with, but it's better then scraping it altogether.
Here's a good video by Metalchasers on Youtube that shows you how to reuse your hardened metal clay.
My last tip is that any little bits of scrap I can't fix end up in my jar of metal clay slip that I use to fill in holes or make connections.