The New 3D Printing Thread

Thats a great idea and I'll love to see how they end up when finished, however I suspect you'll find recreating a wood effect far more difficult than you can imagine.  I'm quite experienced with painting as I used to paint loads of wargaming miniatures when I was younger and wood is one of the most difficult things to recreate, especially if you want to do so on a flat surface.  If you have the grain built into the moulding then its a lot easier as you can just paint it with a light brown, give it a brown ink 'wash' then if needed add some intermediate brown dry brushing to lift the colour of the surfaces.  Either that or use something to remove the excess ink from the raised surfaces, its difficult to say which would be better.

Incidentally Hornby has some of the 4 wheel teak coaches in their 2024 sale at the moment if you're looking for cheaper versions of their work...