Ok it's ** odd years since I did any work with copper at school. so I've forgotten a lot about it's properties.

My OH has very kindly donated some copper wire from his reel of ringmain cable (well he wil donate it just as soon as he misses it lol!). I want to use this to make some copper coil spacers for a necklance, they will be approx. 12 - 15mm long and will be threaded onto one of Diane's SowZereE Silks. Stupid as it sounds it would be helpful if someone could answer the following:

Do I need to heat them with my hand torch before I make the coils?

Will I be able to tumble them without them loosing the shape?

If I can't tumble them will hand finishing harden them off sufficiently for everyday wear?