Thanks guys
Polished alloy frames discolor way faster then slides which is why I was going to paint it.
The reverse two tone is growing on me though, maybe I'll try some Stainless DuraCoat, still be two tone and will not discolor.
Might even do my Kimber in that too, it's frame discolored in just a few days from handling.
Before it started to turn grey it looked like this.
The front strap and right side near the safety and now dingy dull grey with a hint of a finger/palm print pattern.