Yup it's totally possible.
Would recommend if you're doing it remove them from the car, give em a damn good clean and rub down with P1000 wet and dry. Degrease them, (fairy liquid) Couple of good coats of decent plastic primer, normal primer would be ok but it'll not last v.long, leave it to go off then coat with a couple of decent coats of you're body colour. Compound buff to mirror shine. Refit and admire your handiwork