This is my first post. I reciently bought a 1959 grumman 19' sportboat. it's a rivited boat and built very rugged. My plan is to do a complete restoration. The boat has various dents and dings. ( most the size of a quater except the bottom which has some crease type dents and old weld repairs. I have been reading old posts about fixing aluminum and removing dents but always find contradictions in methods and philosophy. some say use heat and monitor you temperture. Others say 5000 series marine aluminum does not require any heat becaue it is not a heat treated aluminum to begin with. I want to get to the bottom of this once and for all. Others say although it's true that marine aluminum is not heat treated the fact that it has been dented and needs to be banged out causes work hardening therefore does need heat to do the job right. If there are any experts out there i would love to know the proper way to remove dents in aluminum boats. If heat is a not the way to go i would look into paintless dent removal as an option. thanks for helping settle this debate. I will have pictures in the future. bill11