No nitro at all. I toured the shop a couple years back and being the paint geek I am I asked their finish man loads of detailed questions. Somewhere around 1991-1992 they switched from nitrocellulose lacquer clear coats to the actetate based lacquer/Urelac/McFaddens Urethane Guitar Lacquer/whatever you wanna call it but they were still shooting the toners with lacquer. Not sure when but the lac. has been replaced with acrylic colors, PPG's DBU line IIRC.