i just picked up a set of old bmx mag wheels and the previous owner painted them white and really bad job at that! :x i actually want them the yellow they were originally but didn't know if there is a trick to get the spray paint off easily or if i should just sand them down and repaint them??? they are plastic... and the yellow they were would match the project i want to put them on perfectly. any ideas that wouldn't be too abrasive and ruin the plastic??