Sanding out orange peel in clear what grit to use first?

Thanks for all the replies. I sprayed 3 coats then sanded 800 grit till the paint was flat and also to straighten a couple of runs (got to aggressive on one run and it still shows) then sprayed two final coats. Now it is time to wet sand. Tried a small area with 1500 grit and man is it slow progress. I am sure mine has more orange peel than some since I am still very new to this. I will continue to work on it. Thanks everyone.