painted mine. pretty easy. just make sure to clean and power wash them so the years of grime are gone. I did mine when i painted the parts using a deetail gun.
then I went back and sanded around the handle with 800 so when i laid the main paint over them it would go on in one motion instead of taping them. When you are done make sure to cut the key lock section with a razor so you don't crack the surrounding paint first time you use the key.
had mine painted again in black but with a clear coat...the same for all moldings around,my 85' is silver grey metallic, painted black clear windshield molds too...now all that black is very glossy.
Had all the car painted ,but that cheap moldings faded by sun was vanishing the body work so i decided to paint all moldings cool effect against a fresh silver metallic paint