Andrew,
Thanks for your response which is excellent. Do like the idea where if the paint is chipped it exposes a silver base that looks like Aluminium. That's class and such an easy solution and so practical.
Have to say I've always liked the A10 since the day I saw one land at BAe Woodford where I used to work and had the chance to look at the aircraft and get to touch it. Looked down the gatling gun and the shells that come out are the size of 2p's, wouldn't want to be on the receiving end of that. Pilot was a Capt Myers call sign "Quag". Had to laugh at that.
All the Best
Phil Beard