Has anyone had their 80% lower professionally anodized?
Yes... I used a shop in PA called M&Z anodizing and sent the lowers along with a bunch of work parts and they did them for free , otherwise they charge $50 minimum up to a few dozen parts. They are horrible at answering the phone or email and do much better with walk-ins. You could also try Eastern Plating in Rosedale, they do solid work on the stuff for my job, but I'm not sure if they are gun friendly or not.