I have only printed these in resin, although they would probably print in FDM just fine with either a small enough nozzle or if scaled up a little bit.
For resin printing, I just print them standing straight up with some supports going about halfway up the outer rim of the coin.
I have included a split in half version if you would like to print them FDM. I would just suggest scaling them up because the small details will struggle through most normal-sized nozzles.
For these coins, I basically follow a 4 step process:
Clean Up - Light sanding over the support scars with 220 grit sandpaper then clean off well.
Paint - I use Rustoleum Bright Coat Metallic Gold Spray paint, 2-3 coats is more than enough for these.
Weather - Some watered down acrylic black paint directly into the cracks and crevices, then wiped off with a paper towel until I like the level of weathering.
Clearcoat- I use Rustoleum 2X Matte Clear Coat to finish, although I’m currently looking for something that dries a little “harder.”
**This design is uploaded with a non-commercial license. Purchasing this file does not grant you the rights to sell commercially.
If you would like to consider gaining access to ALL of the models and the rights to print and sell, you can check out my Patreon at patreon.com/thinair3D