Tobey, I can’t give any definitive help with this problem (I
would tumble it and then polish it) but for future reference,
Cookson Metals (in the UK) now offer heat-hardenable 925 silver,
which becomes VERY strong on heating. I have used it for brooch
pins and settings and it’s great, although it is rather difficult
to use as it can’t be shaped after soldering.
I’m sure that there must be a supplier of this in Canada. If not,
mail me and I will send you the details for Cookson.