David, I have been fighting this same issue since I got back into the hobby a few months ago. I have tried air brushing various brand craft paints and Tamiya arcylic paints, Rust-Oleum rattle cans, and finially Tamiya lacquer rattle cans. Around here the humidity is a little to high early in the morning so I wait until about 9-10 and on a sunny day the humidity is normall below 65%. If it is not a calm day I use my makeshift spray booth outside and for me it does help with the orange peel. I think on windy days I tend to spray it to heavy creating the orange peel. For me.....I have gotten the best results using Tamiya lacquer rattle cans and Tamiya TS-13 clear or Rust-Oleum 2X Gloss Clear. The results seem to be the same with both clears. With the lacquer paint I spray two light coats letting is flash 15-20 between coats. I spray a 3rd and maybe a 4th coat to make sure I have it all covered. Same with the clear, except the last coat I keep the model moving and spray until it gets a very wet look. Be careful as there is a fine line between wet and running. Depending on the outcome I usually just polish with Novus products and Meguiar's Mirror Glaze. If it does have a little orange peel I'll wet sand a little. I try not to wet sand if at all possible. That's just me. The 60 Chevy pickup I just painted and polished the other day. I'm sure others will have different takes on this but like I said, this is what I have found that works the best for me.