So I'm actually going to do this in the next week or so. I've painted plenty of plastic car pieces in the past. Take your time with the prep work, lay light even coats of primer, then light layers of paint and clear coat if you want. If done right it'll look good. If you want it to last "longer" apply lots of coats. I've found that 6+ good coats of paint and about 4+ coats of clear yield's a good product and for the most part will last quiet sometime to regular road grim/debris with little to no chipping of the paint.