""""Flieglack 7012 and 7122 were both based on phenol resin ("
Phenolharzverkochung in aromatischen Kohlenwasserstoffen") and Flieglack 7155 was based on polyvinylchloride (
"Polyvinylchlorid und Antimon in aromatischen Kohlenwasserstoffen").""""
http://en.wikipedia.org/wiki/Epoxy - look at 2.4 Phenols
Chemestry is not my strong side, so might be
misinformed or
wrong ( I can take that, thats part of learning more ), I see PVC plastics there - but the "composite chemistry" of the paints was basically that Luftwaffe paints need hardener ?
SZD Jantar is rather old by todays standards ;-) and yes, Gelcoat (epoxy or polyester based) often chalks outside.