Strongly agree with Oxford, that flat plinth across the bulkhead is going to look as if it's designed in once it's sanded and painted.
I used a B&D 'mouse' sander -
http://www.ebay.co.uk/itm/Black-amp-...p2054897.l4275
one of these wobbly jobbies -
http://www.ebay.co.uk/itm/Long-Bed-S...item2c81868947
and a whole bunch of these sponge blocks -
http://www.halfords.com/webapp/wcs/s...0151&langId=-1
I also bought a random orbital sander but it was pretty much useless as there isn't a flat panel on the body. The mouse was much more effective.
The wobbly thing worked really well on the rear wings and head fairing while the medium sponge blocks made flatting the high build primer a doddle and the fine ones were equally effective on the top coat before finishing with traditional wet 'n' dry paper.
The dust mask tip is good advice btw...