The piece of Silver that my daughter brought for me is 4 1/2 inches x 2 inches. I have some paper stuck to the underside with Sticky Roll paper that you can get from The Scroller Ltd. ( Sorry I Have forgotten the proper name of it ) I find what I would like to cut and attach in the same way on the top. Because I have enough silver to hold onto I don't need a jig. I use 2/0 jewelry blades to cut and turn the speed down low. When its cut I sand the piece with some very fine sanding pads that i got from www.alphaabrasives.com 3000 being the finest., when the sanding is complete I wipe the silver over with some rubbing alcohol, this takes away any sticky residue that may be left. My daughter's got a soft mallet made from plastic I think, and I hit the item I have cut a few times both sides and this hardens the silver without marking it. With the hand held Dremel I polish the silver with a wire brush and then rub some auto polish for mag wheels and aluminum on and buff it off with a buffer in the Dremel. At this stage it will go black but that's OK just keep buffing it will soon shine up. Then wipe over with a baby wipe and dry off. Finished. Hope this helps in some small way.
Marg