heres some info for you guys that want to know about prepping
if your going to seal the car before paint then you should do 320grit by DA
if you dont have to seal it, then do it to 400 grit by DA
if your hand sanding id reccommend something a little higher in grit because you may leave rough scratches by hand, but it is fine just takes longer
when prepping, try to knock off the clear if possible, if by hand you dont have to but the more clear/paint you sand off the better adhesion it will have
you do NOT have to take all the paint off unless you know what your doing i wouldnt do it
if you use a DA sander try not to angle it to sand out chips, keep it flat or you will have big bulls eyes in your new paint from uneven layers of paint sanded off in one area
if you guys need any more help let me know!