Hi Jeffo- I used butyrate dope and a cheap ~2" brush for 1/5 scale. I mixed olive drab and Miami blue 6:1 ratio then thinned it 50% with thinners. Who knows if this color is correct- I like it! Dip brush in dope ~1/2" then paint until the brush goes dry. Do not brush over areas you just painted. Keep doing this until you are done. The airplane was painted this way at the factory. The wings, ailerons, stab and elevators were all painted separately so the brush strokes should not match up. The fuse sides were painted with vertical (pretty much) brush strokes. The fuse top was painted at a slant starting top right and going down left. The wings were the same but the slant was almost vertical, maybe ~20 degrees. The ailerons had more 'slant' as evidenced by photos. Spin the wheels and start painting from rim toward hub. The stab was painted like the wings. I mixed a little forest green in light blue to give the paint a turquoise effect that varnish caused back then for the undersides. Note how the underside paint is 'returned' to the lower side of fuse and around the tail feathers. This is 'scale'. Here are some photos of two arf Drl's I changed extensively.

edit: Diana cream used as base coat before applying streaky finish.