Painting/Powdercoating Gear Knob (Jasper Conran)

Technical Area Body, Interior & Styling
1
  1. My model of MX-5 is: 2001 NB Jasper Conran
  2. I’m based near: Stirling

I have a Jasper Conran with a metal gear knob which was originally platinum to match the car but has been quite heavily worn.
Any ideas about painting/powdercoating/refurbing it.

I see posts about leather knobs but not metal ones.