You CANNOT color sand the base coat as you will sand into the metallic flakes and ruin the look. Only option is spray several coats of clear to the point that "color" sanding will knock off the high spots of the clear coat only and leave heavy buildup of clear in the low spots. Might take multiple stages of sanding clear and re-apply more clear. Do NOT sand through the clear or you start over with base.
Might be easier to sand down the base coat and re-spray base.
Edit: Re-read your post, slight orange peal is normal and addressed by sanding clear coat.
Last edited by DavidF; 04/17/2013 10:31 AM.