Spot on Dan! When you spray the band, allow a decent amount of overspray, feathering outwards, progressively thinning away from the band area. This will help avoid a ridge forming when the following paint coats are applied. As M pointed out, a coat of 'Future' is a good idea, although probably not required if you're using enamels and a low-tack tape, such as Tamiya. That one's up to you.
Sounds like it's coming together nicely mate! BTW, do you still need those decals for the 'grey' crosses? Give me a shout if you do, and I'll send them by cleft-stick runner - or maybe Air Mail.