Here the gun with the goggles I've modded.
They were plain black, and didn't need a basecoat. I took out the lenses and sanded it, then washed off the dust from sanding with soap (works really well to get any oil and all the dust off) and set it to dry.
Then painted with metallic paints.
I've also fitted the goggles with a leather strap from the same leather I made the holster for the gun with. The strap has a little nickle colored beltbuckle too