The linen effect:
First you spray the wing with sand color( vallejo air 71.075), than you mask the ribs whit Aizu masking tape (0.7mm). You spray over with Mr.Hobby Gunze Mr.Color "Tan 44". Take a pigment (i took tamiya's tamiya weathering master-"mud") and brush it all along the rib area (not to much). Take off the masking tapes and spray vallejo 71.075 "sand" over the all area. Not to much- make it transparent.
That all.