Got my silver buckle done. Printed in 0.12mm layer height (0.2mm might have been ok as well, but decided to get it as smooth as possible coming out of my printer) in PETG. Sanded (working myself up from 90 to 500), then coated with a thin layer of UV resin + baby powder mix (and of course hardened with a UV light), and sanded some more.
Applied some primer first:
View attachment 1909228
Then used silver on top:
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Finally added some satin vanish (so that it's not too glossy, but also not too matte), bit of blackwash (thinking of doing a bit more potentially, as it is still a bit too "bright and clean"), and some fuller's earth powder (for a slightly dusty and not so clean look).
Here it is with my belt and the 47mm roller buckle:
View attachment 1909230
And testing it:
View attachment 1909231
Need to punch a couple more holes into the belt, as we've seen the on-screen belt has holes going past the silver buckle
View attachment 1909232