So, the short and skinny of it, if I want to do Clemens Schmoll's 'Red 13' (WNr. 210913), I'll have to repaint the lower wings, change the RLM 83 to RLM 76? Much obliged old boy! Get on it after some fresh air and shop visit...
That depends on what you've done with the lower wings - while the few 2109xx a/c known are thought to have all RLM76 or W2 (the front half of the wing painted), its also possible that they had RLM83 front halves of the lower wing; the fact is very little is known about the 2109xx batches, other than some upper surface images... Which seem to show RLM82/83 wings and upper fuselage, with RLM81 fin Mottles...