here is a mix from a hasegawa subaru wrc it uses gunze arcrylics.
(paint no 65at 35% no 80 35%& no 47 at 30%). I have not used it but the mix makes sense, i just cant remember what colours they are. I found this at
www.1999.co.jp where you can view the instructions for some of the models, hope it helps.
Regards Bob.