I have done a bit of timber graining in full size practise with a rubber graining tool but I'm trying to get white styrene to look like varnished timber. So far I have only experimented with painting a bit of styrene with a red/brown paint then with a dry stiff small brush removing some of the paint so the white can be seen underneath in sort of a timber grain effect. Results look exactly that but maybe guilty knowledge? I'll try with a pale brown under coat and a dark brown topcoat and see if that looks better. If it all goes pear shaped I'll just paint the windows but the prototype is all brass and varnish....
