Peter wrote:I have some bottles of AK but these are all for weathering purpose. Never used them so far, but I'm working on a few models and then I will use them. And if possible in open air because I have to be carefull for the smell. Could give me migraine.
For the colors you mentioned I will try to find the Vallejo colors.

Hello Peter,
I found this in the web for example. But if you look you will find other solutions as well. And there are also painting sets from Vallejo to use for AFVs, I think.
February 1941: - Initially vehicles sent to Africa, arrived painted dark grey (Dunkelgrau). Units immediately sought out ways to cover or break up this color. Mud, local stores of paint or paint borrowed from the Italians/Luftwaffe are among some of the solutions crewmen found to camouflage their vehicles.
Color Vallejo
RAL 7021 Dunkelgrau 995
March 1941: - Vehicles in Africa were to be painted yellow-brown (Gelbbraun RAL 8000) and grey-green (Graugrün RAL 7008) using two-thirds to one-third ratio.
Color Vallejo
RAL 8000 Gelbbraun (Grünbraun) 879
RAL 7008 Graugrün 866
March 1942: - Yellow-brown and sand paint (Gelbbraun RAL 8020 & Sandgrau RAL 7027) were made available to be used once current stocks of Gelbbraun and Graugrün ran out. The colors were to be applied using two-thirds to one-third ratio (yellow-brown to sand) with feathered edges.
Color Vallejo
RAL 8020 Gelbbraun 847
RAL 7027 Sandgrau 819
Green Tigers in Tunisia: - “Panzer Colors” notes Allied reports that some Tigers and Panzer III’s in Tunisia were an overall medium olive green. Sometimes this color is incorrectly identified as RAL 7008 (Battlefront recommends Vallejo 924 – Russian Uniform if you wish to model this).