Tri-coat candy paint doesn't like tight inside corners either. Especially like a dark candy over a light base.
Goggle " Faraday cage effect" to explain the problem in powder.
I'm also very picky, and paint for a living, but frames for anything are tough. Usually once it has all it's clothes on the defects are much more tolerable.
Edit, I realize that I didn't finish my thoughts on the subject... If you paid a real shop, real money, and aren't happy, by all means take it back and let them know about it.