Tamiya do a white "curveable" tape, can't get on with it myself - given the size that needs to be masked, you might be better off making paper templatesGet the narrow Tamiya masking tape. It's good stuff and goes round curves quite well. There are a lot of guys on the military modeling thread who know everything you need to know and then some more about masking. They will be happy to help.
Get some lexan rattle cans and have a practice. Light coats are much better than a heavy one and will not bleed under the masks.
Enjoy the build! Any questions on the RC side just shout.