OK, warbird experts

I have a weathering question as I start to weather my Taylor Spitfire. Would you streak your fuselage with weathering perpendicular to the thrust line or perpendicular to the ground when it's on it's wheels? Most color profiles seem to show it weathered top to bottom perpendicular to the thrust line, but would this look 'right' on the ground. I'm talking about the general streaking. I've done all my painting in a top to bottom motion, and on the wing in a chordwise motion.
Here is a picture after the initial steps of weathering the bottom of one of the wing tips. I'm still a few days away from really getting into the weathering as I need to finish stenciling....does it ever end!?! lol
Thanks for any input!