Thanks for all the advice everyone. For now I think I will attempt some minor touch ups first and see how they look. If they look too obvious and crap then I might look to stencil it. Maybe I will have a go at doing some myself, it may not be worth someone like Gav making one since Buck Rogers is hardly a sought after game so he would probably never sell another.

One final question, if I do stencil myself can I get away with leaving the side rails on and just masking them off, while I sand, fill and spray the rest, or am I being a lazy SOB? My understanding was the System 1's had twisted/threaded nails in them which can be a mongrel to get out without damaging the rails.