I dont have the FSM article 'cos I borrow them from the library!
I would say kitchen foil would be more difficult than BMF but I also think you could de-shine BMF with a very fine steel wool.
Jims point is worth noting. Panels will vary in colour as a reult of different material spec and different 'grain' direction.
As a civvie I have absolutely no idea how a Sabre went together. However I can make some educated guesses about the materials used. For instance the intake is a compound curve so is probably made from a heat treatable material, possible in welded together sections. This will be a different shade (and surface texture) to the Alclad panels on the rivetted structure. Same applies to wing tips, root fairings etc., which are low or no stress and would use heat treated alloys or straight aluminium.
Also there may be some different materials used. The hot end often has titanium or stainless panels, and sometimes stainless is scabbed onto areas where there is rubbing wear, ie all-flying tail to fuselage junction.
Best advice with any scale model is to do some research. Get a look at as many pics of the subject as you can and work from there.
Bloody hell, I may just have to tackle an aircraft model yet!
Regards Dave