Peter James from Australia sent me a great idea that his son Martin came up with:

Meanwhile, Martin came up with a great method for applying the colour scheme to the fuselage. We simply loaded the colour scheme in to Photoshop on his Mac, connected a projector and projected it onto the fuse. Attached is a pic of the dummy run. Aircraft goes to the paint shop Monday.

This is a very, very neat idea. It could help save a lot of time when marking paint lines onto the aircraft.