KE, the capstrips just fly over the spars. Capping the spars isn't a bad idea, it would save me the frustration of accidentally nailing the monokote to a below grade spar. Only rookies do that, though
Over in the Extreme Speed forum there is a shot of a good looking SR71 covering sceme that looks like silver on top with flat black on the bottom and some small % of black on the top. Might be the most functional way to go? Gotta come up with some CIA insignias, where do you find those [8D]?
Once this plane is done, I'm going to have fun flying it over a local commune full of paranoid 60 year old hippies up in Arlington Heights...might have to try those Flyquiet pipes out?