Painting wood

The canvas wings are easy- there are a couple of colors that work. I prefer Testors Model Master "sand".  Just a few drops of flat white makes it even closer.

The stained wood parts are something else.  Doing a good job of wood is about hardest painting job there is. I find I need to do a brush painting on it instead of airbrushing. I usually do two coats two colors, a base coat (usually a lighter color)  and a second, translucent coat, either a wash or drybrush.  Since the drybrush coat tends to look pretty flat, I then overcoat with gloss clearcoat (usually Testors glosscoat).

WWI aircraft modelling almost always requires wood grain simulation. I do it the way I learnt at Swanny's Models website. That is, spray a coat of sandgelb or similar, wait for a day and when dry, protect it with acrylic clear cote, like tamiya x22, wait for a couple of days, then take a wide brush and stroke brown artists' oil paint. When you lift excess of the oil paint from the surface, sandgelb from underneath will be visible, simulating a wood effect.

Check my 1/72 camel build and see if that's close to what you want. You can find a detailed explanation with photos on Swanny's.