chuknwind,
You can try thinning your paint to help get rid of the splatter. Also, take apart your air brush and look at your tip under a magnifying glass to see what kind of shape the hole is in. Sometimes, you can get a split in the tip and never know it until you look for it. When you shoot your baits, for a more distinct line and less fade, hold your air brush close to the bait. When shooting the black stripe down the back. I hold my brush 1 inch or less. This should eliminate overspray and give you a sharp contrast and rich color.