Gondor's Grumblings

[The Wooksta!]

If you do consider a B-29, have a rethink on trying rattle cans.  Buy some cheap and nasty silver spray paint from Poundland or B&M and practice on an old model used as a mule.
If and when you feel confident, upgrade to the generic Aluminium from The Range.

I tried hand painting a B-29 many years back and hated the results.  Spraying is the best route for something that size.