Pete, I usually use a woodish-coloured matt paint. So far I've used Tamiya 79, Mr Hobby 66, Humbrol 110 (the floor of the Spad I've just started) and Humbrol 98 as a base and a mix of raw sienna, burnt sienna and burnt umber, with a touch of Naples Yellow, for the grain. None have given me the light, yellowish finish you've managed to achieve in this build. That's a colour I'd like to get close to painting- it looks just like varnished oak. I think I'll try a lighter base (Mr Colour 85 or Humbrol Authentics Linen- yes, I still have a tin) and perhaps a raw sienna and Naples yellow for the grain.
Cheers.
Dal.