Anyone have experience with np3 coatings?
good or bad.

Yes, but not exactly in the way you may be interested in. We were having problems with weapons carriage (bomb racks BRU-xx) parts gumming up (not sliding against each other smoothly) during the bomb release cycle in testing. The parts had a "solid film lube" type coating to minmize friction and corrosion, but until well worn in, the coating instead was causing a problem. We/engineering had the problem parts coated with this NP3 stuff to check it out, and they worked 'slicker than snot' right off the bat. The drawings were changed afterwards and the problem ceased to exist.
Not sure this helps you any...

http://www.robarguns.com/index.htm For others that may be interested, here is a link to a company that does this.

My carry Colt LWT Commander came out of the Robar shop, including the complete NP-3 finish.

Wears well, aids in cycling as it is slick and resists corrision very well.

I've always thought it would be ideal for a bolt assy (inside, parts and outside) as well as the trigger group.

I had the bolt of a NULA rifle done by Robar. Very nice and slick. I like it a lot.

Jeff