My Minis' got the full treatment, front bumper, hood, fenders, mirrors, door edges, rear fenders. Done really well, mostly invisible. Car still looks basically brand new when I wax it and I commute on the freeway daily. Very worth investment to have in professionally installed.
I've done some vinyl work before and for compound curves like the rocket tank you're going to want some super high quality material. The 3M stuff really is great, stretch pull tweak yank tug, then heat with a gun and zips right back to original size and shape.