No idea on getting those guns all over the plane (pretty sure I wouldn't do it, but that's just me), but having built a skybolt and covered it in black with some red stripes on the top & sides I can recommend you do something bold underneath to make it easy to tell top from bottom in the air. When they're flying these planes are hard to spot the difference between right way up and up side down in a single colour. I ended up putting two large "spades" (as in ace of spades) in white under the bottom wing as a visual cue.