Yep i'm going to do this in a DAK scheme and I saw this photo of the round tail light. You say this is not correct Dario?
HM 1942, No.315
1. Instead of dark gray paint (HM 1940, No. 864), the equipment (including motor vehicles) of the troops in action in Africa should be painted with RAL 8020 Brown and RAL 7027 Gray paint , both colors with matte (not gloss paint).
Brown 8020 is dominant, approximately in the proportion of two thirds brown to one third gray. Gray 7027 is to be applied in irregular spots, with the two colors blending gradually into each other.
Small surfaces, wheels, etc., can be painted in one color, 8020 or 7027.
The previously used colors, though, 8000 and 7008, are to be used up.
2. Paint that washes off, as stated in HM 1941, No. 1128, is also to be used for painting canvas.
Tony Lee