Where to find body shop that specializes in aftermarket parts repair and install?
 

I just recently bought an HT Autos Bodykit for the 2016 FRS. It's made out of polyurethane and I saw that if you looked close enough there were small micro sized craters, some large, scattered all around. I'm guessing this is from the manufacturing process?

I went to one of the best auto body shops in my city and the tech said they were uncomfortable trying to repair the body kit because even if you tried to put filler in, when the paint gets applied, he said it would get sucked back into the pocket of holes. He mentioned that there were some shops that specialized in repairing aftermarket parts, but I had never heard of them before. I don't even know where to look.

Where can I find a body shop that specializes in aftermarket parts repair and install?

You just have to ask around. Aftermarket shops in your area or people in your local 86 community. Someone should know someone.

I don't know if either of these two shops will do exactly what you asked, but for all mechanical and bodywork for my FR-S, I go to PTuning in Manassas and D&V Autobody in Sterling.