Acrylic is.....um...plastic.
There must be other sources for nitro though.
I like nitro, it's definitely pretty easy to use and looks great. But I'm having trouble getting past the environmental/toxic part.
I'm interested in using the KTM9 that LMII is selling --anyone know if it's the same stuff as the water-based finish StewMac is selling?
Also, I played around with a tung oil varnish on one guitar --at first I didn't like the results, but it's been close to a year now and I have to say, the guitar is looking pretty good now (I rebuffed it a couple of months ago). I think the oil just needed a really long cure time. Don't know if I'm patient enough to use it again though, not if it takes a 6-month wait before the guitar is ready! But it has the avantage of being non-toxic, all-natural.
Oops, I'm rambling.
I think the stew mac stuff is the Target Coatings waterbase spray lacquer. Not bad stuff, pretty hard after about a week.