Well I wont add my ways of doing things because you seem to have plenty of info on hpw to paint. But I would add this to say and show as long as you keep up with it, meaning cleaning it regularly and waxing it you wont have a problem with noticeable scratches. I polish my center console when ever I do a main interior cleaning usually once every two months and its shinny as the day it came out of the booth.

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ASE Certified and I-Car Auto Refinishing Paint Technician
-78 Monte Carlo -01 Monte Carlo LSX -04 Cobra w/my friend KB