I have a copper trumpet mute (shaped like a vase with a hole top and bottom) that fell out of my trumpet on its first outing. (Yes the shop did warn me that it would happen, but I was a bit disappointed to have it happen on the first day!).
Anyone got any tips for removing the dent which is about 1 inch across and 1/8 inch deep? It would be possible to get something L-shaped into the mute if needed. Or would suction from the outside help? Are there any thermal techniques?