David,
This how I get the dents out. You want it to be clean
inside and out as any dirt or carbon will be transfer to
the metal. It helps to polish it first as you can better see
what you’re doing. I doubt that hammer with its
changeable heads of different hardness is still available.
For me its just the thing for straightening brass and
aluminum
.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.