Dave, everybody in my house still has their own teeths, so we are greatly lacking in Steradent.
However, I have two stainless steel revolvers, and clean the burn marks off either with the product made for that purpose - the Birchwood-Casey lead remover cloth, or better and far cheaper here in yUK, the Kleeneze 'Miracle' cloth. It's the same kind of material, smells the same, same colour and all that, but is twice the size at half the price.
Every owner of a stainless gun should have one - or two.
tac