The fuselage: overall wood with varnish (Humbrol colour as indication); Wings (and linen parts) cellite. Metal parts were painted in a colour like light chocolat.

Scheme Colour name FS number Humbrol XtraColor Vallejo Model Color Vallejo Model Air
Standard #1 Fuselage Wood   100      
Wings Cellite ~3531 121 X105    
Metals parts, struts, etc. Chocolat   94      

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.