Fabric covering processes

I'm working on a fabric repair on a Pitts, but I'm unsure as to which
process was used. I'm familiar with dope processes. This material
appears to have no base tint to the fabric (green nitrate/red
polyfiber). There is no silver UV coating. There is a white/light grey
base coat and a very glossy paint/color coat. This stuff is very
tenaciously adhered to the fabric. None of the common shop solvents will
soften the paint.
Two previous owners swear the stuff is Superflite, the logbook shows
Airtech. Know of a way to positvely ID what I have here? Thanks

Jerry