✔ 最佳答案
Sorry to hear about your friend's flute, normally we take it to the music store to ask the professional to fix it. The guy will insert a metal rod inside and hammer the rod level out the dent, it will takes some time and experience to fix it, also depends on how badly dent and the location; my repair guy fixed the dent on my flute and clean it, thanks god that is nothing happen to the sound.