These are the pips and squeaks for a Star Trek "monster maroon" costume that go on the cuff to tell how long you've been in Starfleet.
Print these with the flat sides down. The perfectly flat side is the bottom. I still can't figure out how to get Fusion 360 to export these things so they're not rotated weird. Drop me a comment if you know.
I didn't try this with a metallic filament, but that might be interesting. If you paint it, it doesn't matter what color filament.
Sand and paint
I only sanded the sides, and only a little. I didn't sand the top or the bottom - the top would lose detail and the bottom doesn't get painted.
I painted this with Rust-Oleum gold paint. It isn't shiny/reflective metal paint but it covers well and looks good. I then give it a little gold Rub n' Buff to get a bit more metal look.
Glue a pin to the back
I bought "butterfly clutch blank pins" - these are the same things you see on lots of pins, where you pinch the pin back to release it. You can get these "headless" where it's just a pin and the back. Super glue one pin to the back of each pip (the round one) and two to each squeak (the oblong/oval-ish one).
The size and detail was based on three things:
- Reference photos - these are all over the internet, but it's hard to find dimensions.
- Commercial replica printed dimensions - the dimensions are listed on some commercial ones I saw on a web site for sale, so I started there.
- Look and feel - my first couple of tries were too thick and didn't sit nicely on the sleeve so I adjusted until it looked about as thick as the other pins.