I also made the pistol from Galactic Armory which is not in the above picture. Assembled from PETG parts and painted using Rubb n Buff metallic paints.

Parts were printed on Bambu X1C with Hatchbox Black PETG and using PLA for support interfaces. Typical 0.2mm layer heights with adaptive layers down to 0.12 to reduce banding on the top of the helmet.

Preparing for painting I used progressively finer grit sandpaper and wet sanding from 140-400 grit, alternating with Rustoleum filler primer. Finished with black primer and 800 grit before applying paint.

For paints I used Montana Gold Shock Black for a base layer, then a layer of Spray Max 2K clear coat, and I tried Montana Chrome Effect over this. It was too silvery, so I switched to a powdered graphite rub, alternating 2-3 layers of graphite rubbed into a semi-soft clear coat layer (after only 15 min of dry time per layer).

Leather parts and base suit purchased from UMBLeather on Etsy.