The only other thing needed would be a tiny brass hammer, about a 2 oz. And, it doesn't absolutely have to be brass. Besides that, A steel hammer with a brass drift, ground to a concave shape on one end, works well. I like to use a layer of heavy clear tape to cover the area around the dent. It just serves to protect the surface finish from the little hammer blows.

May God bless America and those who defend her.