Little off topic, metallic paint.

[old guy rich]

I'm hoping someone can help me with my problem of orange peel in metallic paint. I'm trying to paint my 50 Merc. Banning Blue metallic, single stage acrylic enamel. I have painted the skirts 6 times each after sanding and no matter what I try I have bad orange peel. I've tried different air pressures, gun different distances from the car, changed the speed of the stroke and finally tried thinning the paint. Any ideas will be welcome. I'm not a painter by any means, but have painted a few cars years ago. Using an hvlp gun. Thanks, old guy rich.