Does not look like they do firearms. I will probably go with Ford in FL.Here's one of the finest chrome plating facilities in America.
http://www.advancedplating.com/site/shop-tour/
I'm sure they probably have a few youtube videos as well.
I've never sent anything to them due to cost. I always used a guy over in Cali who would send bulk to Mexico for plating. Less regulations and cheaper prices down there. I'm sure the quality doesn't compare though.