I used somethink called vinyl dye. It's almost like paint, but it won't scrats as easy.
Not the same part on the before and after shot, but the result is the same on all parts before and after.
Cleaned the parts with some media blasting before applying the dye with a paint gun.
Did you have any problem with static buildup during blasting, then discharging and knocking the sh*t out of you? I tried beadblasting some plastic parts trays last week, even using a grounding wire on the part to the cabinet frame. It reduced the effect about 75%, but it would still light me up, and it was not a light jolt

.