I agree with there being an art to black cars (which I hane't mastered yet), is there a polish/other product that will remove swirls and light scratches without a machine? (Can't currently afford to buy one). I've been using srp cause I've heard a lot of good about it, but now, I'm not so sure, it does give a pretty decent shine though. Also, remember to use plenty of lube with the clay car, I think I've done the mistake of not using enough and not having the clay prepared enough, which is where I think a lot of my scratches are from. Thank god christmas is coming, I'll try and convince the parents to supply me with a machine polisher.