Hi Brendan.
Ramp tours at any of ACSA's main airports are virtually impossible. You'll either need a good contact airside at JNB or a letter from a magazine (etc.) basically asking ACSA to grant you a pass to commercially shoot for them.
FAWK may also be tricky - although I honestly don't know. You might be better of trying AFB Swartkop.
Sean
Forumer™ is Voted #1 Free Forum Hosting provider
Build your own community today with the largest message board hosting company.