Rasymus

For thin metals, foils, I have had excellent results using a rubber like material that is used to cover floor drains in the event of chemical spills. It is somewhat tacky, care must be taken to keep it clean so that the dirt particles do not transfer to your work. For heavier metals I would imagine that the rubber would break down over time. It would not be cost effective to purchase new, but if you could get some that has been used and discarded I would suggest you try it.