[Mr70]

I use Sparvar #S124 Dull Aluminum in the rattle can,but you can use any Dull Aumnium color from Rustoleum or Krylon too.
Sometimes there is sand or small minute pebbles embedded in the corners and seams on these tail lenses,from the rearwheels spitting up road debris.
I tried dental instruments in hopes of picking them out,but to no avail.I found submerging them in a Jewelers ultrasonic cleaning tray and hitting them with small sound vibrations gets them to release with out having to dig into the plastic.