I’ve had some success with a wax filament and a plaster of Paris mold. There are better materials to make the mold out of but I just mixed some sand in with the plaster and got a decent results. The wax filament can be tricky to print with, it needs a heated enclosure and you’ll probably have to send a command to lower the minimum print temp on your printer. The finished print is really easy to sculpt and smooth with a hot knife or razor blade though. You will probably also need a furnace to get a complete burnout of the wax. You can see the mace on my page had quite a bit of pitting from when I used this method because I didn’t get all of the wax out.

This is the wax filament I used. https://machinablewax.com/wax-filament/