Doming ( or dapping punches as they are often referred to by jewellery makers) punches are expensive for what they are- basically highly polished pieces of curved steel. I have a few comercially made punches and a brass dapping block but I needed larger ones for a project. I couldn't justify the expense knowing they would only see occasional use, so I made my own.
they are cheap, easy and quick to make with only a few tools, yet they still delivers excellent results.
Step 1: Tools and Materials
1) Sanding sticks of various grits I've used 120, 240, 320, 400, 600, 800,1200.
2) A few loose pieces of sand paper of various grits
3) Buffing stick (an old leather belt glued to a piece of hard wood) or a polishing motor with stitched cotton buff.
4) Buffing compound (I've used blade honing compound as it 'cuts' steel quickly, you could use jewellers Tripoli or brasso with good results)
6) A file.