Reading over the previous threads, I have to agree with the battle scar appeal and let it go. Maybe paint a band-aid across it for conversation attention

Meanwhile, my wife (who worked several years on Grunman mail trucks)says the sandbag and mallet is a good plan, but work it out very slowly.

Personally, I have strapped down the boat/canoe and used shaped wood and 2 ton hydrolic jack to slowly press out the dent. The rejoiced when Kevlar canoes hit the market