I always thought the yellow writing on the blue face of the A300 and A350 looked worse than the original white. Only when the A500 were reconstructed did OSE thought of the visual power of the lettering. Sorry about the moan and the off topic. I am off for a cup of coffee.
Upon closer inspection the carriage next to the BDm in my last picture is a Gosa Buffet. Note the white writing and logo, black solebar and a paler green, I once saw on the Internet a photo of this Buffet by Pierre but I will let him present it here if he wishes.
Hi Zoltan, and welcome to the forum. I do not know what colours OSE uses but the paints I used to produce the HO VEB versions are: Green RAL 6020 Red RAL 3020 White RAL 1013 Black was unpainted plastic