We have a Guy in town that ceramic coats saiga 12's with NIC industries ceramic also known as Lava Shield. This is the best coating in the industry hands down. He normally takes 2 to 3 weeks for turn around. His business is Cuervo Custom coating and his name is Jose. I think it runs $350 for a complete coating of every single part in gun including FCG, piston, springs ect.
PM me if you want his phone number.
Here are pics of a AK he just did for me