These are unpainted plastic that are "Pebble Grained" and hard to match up if sanded. Lots of work but fine sand the whole part smooth, finnish with some 1500 grit, buy some "Plasticized" paint in a color ya like and shoot it. The paint must be a type that bonds to plastic and flexes without cracking. Krylon "FUSION" works well.
"Never mount a passenger car tire on a motorcycle rim; the flat profile of a car tire is incompatible ....."
TOTALLY HOG WASH!!!
SSG/E6 Retired US ARMY Signal Corp. 9th Signal Bn, Forward.
50,000 miles on a CAR TIRE/DARKSIDE.