Hi John,
Without doubt the best tape to use is Tamiya (about £3.50 – 6mm), available at most model shops. Mask off top and bottom of your band, now, using cheap and nasty masking tape from the £1.oo shop (3 rolls a squid) and clean white A4 paper (you could use brown parcel paper or thick tissue) mask off the rest, lapping the cheap stuff to the Tamiya and not onto the model. Do not use newspaper, the solvents in the paint can transfer the print onto your model.
Cheers – Ken