Jan Bobek of HGW has been releasing beau coup detail parts for aviation subjects for over a year and a half. I picked up some of his Wood Grain Decals and had a go. The sets I tried first were for the Eduard or Blue Max 1:48 Austro - Hungarian Albatros D.III (Oeffag). While good decals overall I highly suggest a clear coat before using them.
Wood grain decal review here.
The 1:48 Austro-Hungarian Sworl Camouflage is by Piotr at Mirage. Very decent decals too by the way.
Sworl Decal review here.