I had my Warmoth Super Strat finished in Vintage Tint Gloss, ...check it out here: ( http://www.unofficialwarmoth.com/index.php?topic=50.0 ).....both the neck and body, but that is poly.....they didn't offer Nitro at that time...........I wanted to tint the Black Korina and bring out the grain to compliment the neck,.... I don't think they will do the Nitro on the bodies, though its always worth calling...money talks..........
It is really worth noting as Max said the poly is very,very thin...so much so that a few swipes with Sand paper to satin up the gloss on the neck took it right down to smooth..... Warmoths poly may not be as Tone friendly as Nitro, but I think its so thin that it would be hard to note the difference compared to a Nitro job in the tone dept.....
I know the Vintage guys would never say that but Warmoths poly isn't like something you would find on a Squire or Epiphone guitar, mine was so thin I could actually flake it away with my thumb nail at the edge of the controll cavity, thats a plus in my book.....