it depends. I might see if I can re-work it. But when I actually melted an antique art nouveau piece I was enamelling (got distracted by someone coming in) I cursed like a nutter. Not just because of the work I'd put in, it was the last firing and looking damn good. not even just because of the price I paid for the pendant, but because I know I would have re-sold it for 10x and could have done with the dosh.

When stuff like that happens, with no saving it, I just blank it and move on.