Thanks for the info. I do use some Tamiya paints but I mostly use Model Master enamel. Here are some things I have found if intrested:
German - I use Burnt Sienna 2007, the original manufactures used Red Oxide Primers. During Nov 1944 until the end, they also used a new Olive Green (RAL 6003) and a new Red Brown (RAL 8012, this was more red than brown).
Russian - Everything before 1942, there was no primer they just layed the first layer of paint which was 4BO (I use russian armor green 2129) and then all other colors went on top of that. !942 and later some manufactures started using primers That was a light pale green dont know the number. I use Pale green FS34227 or green zinc chromate B1734.
USA - WWI they used a lime green. I use Pale green FS34227 or green zinc chromate B1734. WWII they used a Red Oxide once again i use Burnt Sienna 2007. During WWII sometimes they used a grey primer but have not found anything for sure about this. Some Sherman tanks were found with no primer at all on them.
Japan - Used some type of an orange?
All other countries I have still not been able to find any info.