Thank you, Heinz (and Happy birthday if I read other threads correctly :))
Currently there is just 2k primer on the car. I had the wings and hood chemically paint stripped - the rest was a lot of elbow-grease.

The car originally had one of the many BRG variants - in 1984 the factory used cellulose paint - Deep Brunswick Green (P030-0427).
After a lot back and forth on this topic the new paint will be BMW Aquabase Plus GN18 (Connaught Green - variant 1)