Airborne Coatings does outstanding work IMO. If I ever need to get anything coated, i'd definately use them. Airborne once in a while coats nipples, adapters, companion flanges, etc for us that we use on saltwater disposal wells.
My TOGs have the Upgraded 2000 degree coatings on them. So far they look good and they've been on for a year. Hope they never looks too nasty or rust....