Need some help, if you please......

I have a rear reflector that needs to have the rear repainted. The paint is gray facing away from the reflector, but is it appears to be "chrome" on the side against the back reflector. Is this correct?

What has anyone used in the past to refurbish the backside of the reflector? Did you use anything to prep the back side?

Thanks

if you could get the old stuff off and chrome paint it then do grey over that, should look stock. Or..touch up?