Here is the reply I posted to your General Modeling Discussion post:
If it's really orange peel (post a pic, if you can—would really help to
diagnose the problem and suggest a cure) you may be able to sand it out
and repaint. However, from your description, I suspect that the top
coat caused the paint to wrinkle. In that case, the only cure is to
strip the paint and redo the paint job.