Brilliant implementation
I was going to do something similiar on artemis whe I first got her, red on the back of the wings (afterburners FTW!) Using EL is easy, I've got/had stupid ammounts of the stuff on Beatrix and it is indeed silly efficient, I think all of my combined lights including LEDS were taking 0.3amps.
You can paint using EL, it's look fantastic on a whole frame, trouble is sealing the layers, which would be a bit of a hazard when it came to stuff that rubs, ie drop outs, anywhere there's somethings screwing in/bolting on so it wouldn't be ideal