Wet 'n' drying would take ages, might be better to use a coarse type of sandpaper to remove the paint and then a finer one to sand the scratches out of the plastic. I don't know how thick the plastic is though. If you've used a relatively soft paint (rattlecans) you might be able to get results with a card scraper. I think I'll try that. I intend to paint the wheel after I removed the thick coats of old paint because it's probably not easy to polish out all the scratches and end up with an acceptable finish.
Wet 'n' drying would take ages, might be better to use a coarse type of sandpaper to remove the paint and then a finer one to sand the scratches out of the plastic. I don't know how thick the plastic is though. If you've used a relatively soft paint (rattlecans) you might be able to get results with a card scraper. I think I'll try that. I intend to paint the wheel after I removed the thick coats of old paint because it's probably not easy to polish out all the scratches and end up with an acceptable finish.