Thanks, ipmsstockholm is dead by the way. Maybe i should scan RAL catalogue one by one.
I don't also like RAL or FS standards, yesterday i sprayed a decanted acrylic aerosol can with my airbrush first time, it gave me great results, no need for thinning (AB cleaning was not as easy as standard acrylics though) but saves a lot cash . I am planning to collect aerosol cans which i use for large amounts.
By the way sometimes i can't find flat version of paint, do you think that adding matt medium will work? It's a thick consistent material, i'm sure that it will thicken the consistency of paint, how can i thin it after? Or spraying matt varnish after paint is better option you think?