For straightening the body and tin works, a hammer with different nozzles is useful. You can make a tool from a regular standard hammer, and nozzles can be made on a lathe.
First, the narrowed side is cut from the iron part of the hammer, for one you can polish the metal to a shine. The resulting platform is leveled and you need to cut the thread in it. If you need to replace the wooden handle.
Nozzles can be used from various materials: brass, ftoroplast, rubber. When it is not possible to make nozzles yourself, you can turn to the turner. The new tool will be convenient to use due to its versatility.