You may want a smaller hammer for small shapes or a larger hammer for larger shapes.
Cold forming sheet metal with a hammer.
A ball peen hammer.
You also have to grasp the fact that you can reduce the area of sheet metal by thickening it.
Follow along as i demonstrate how you can begin shaping metal with hand tools only.
You have to adjust your mind to the concept that when you hammer on sheet metal with a steel hammer onto a steel dolly or anvil that you will expand or increase the surface area by thinning the metal.
Something like a sharpie to mark on the sheet metal.
Hammer forming is one of the oldest simplest and least expensive ways to shape sheet metal.
This is a handy metal fabrication technique you need to learn.
I used a 16 oz.
Something to cut the metal like sheet metal shears or tin snips.
And some sand paper to smooth out the edges.