How Do They "Restore" Damaged/Dented/Bent Trim Anyway?

I just massages some trim rings. Making them flat is easy, put 'em on a flat backer and hit them with a flat hammer! now trying to replicate a radius or a rilled lip gets challenging as youll have to make a like shaped anvil or backer. I thought of using a piece of 1/4 plate bent in a radius to get the edges of the bezel to become flat but I went the other way and beat the dings out from the inside with a punch. Very intricate work as the punch makes small corrections and if your backing is not squared, your making more problems. I used a piece of heavy glass as the backer for its hardness and snoothness. there is only so much stamped 24g AL in those to file down and polish before you break through. Those little trim anvils are probably worth their weight for doing this stuff.