After you have wetsanded your orange peel, 1000-1200-1500-2000-2500...also I would reccomden you get a sanding backing pad like this one
http://www.meguiars.com/?pro-sanding...ng-Backing-Pad
U should be able to get this at ur local auto supply store, the reason why you need this is to get even coverage while sanding, once you have sanded it down to 2500 grit. Try a polish that is designed to take out 2000grit sand marks, you can try 3m perfect it 3000, Optimum Polish..try it first with a Polishing pad something like this
http://www.meguiars.com/?pro-pad/Sof...Polishing-Pads
if its not buffing out properly...then try a cutting pad with the same compound something lke this
http://www.meguiars.com/?pro-pad/SOFTBUFF-Cutting-Pad
If you do have to use the cutting pad, make sure you go over the finish with a finer polish and a polishing pad..an example of a finer polish would be this
http://topoftheline.com/menfinpolll.html
are you going to be using a rotary or a PC?
Hope this helps