its a pain in the arse job, i did it with the front and rear bump strips on my leon. when u have to do it take them off (without breaking them) i couldnt get mine off so i masked round them and get sum wet and dry sand paper, i think i used 300, 500 and 800 grit paper. then totally smooth them off, then u think youve done it. DO IT SUM MORE - youll notice the difference with more time u put in. then once they are totally smooth, clean them with panel wipe or summat similar then put a few layers of plastic primer on and allow to dry between layers (only like 10, 15 mins). then smooth off with the smoothest paper uve got and leave for 24 hours. now using long slow steady strokes build up layer with the paint and allow again to dry between layers! ull need about 5 or 6 layers, also if ur car is metallic ull probably need a laquer. then allow to dry for 24 hours and then take off the tape.
a few tips
- dont do it if its too windy
- dont do it if its too hot
- dont do it if its too cold
- dont do it if its gonna rain
- dont be impatient - take ur time and itll look alot better
or just pay a body
shop to spray em or if uve got money to burn have them smoothed out!