Hi mbh8585...welcome to the dark side...I myself have recently switched my focus to armour and run into these questions. My research has revealed to go directly over the gloss finish of the Future. If the model has a flat texture, the wash will tend to bloom (an effective technique in it's own right for fuel stains, etc...but probably not what you're after for an overall wash)...the gloss will also aid the capillary action of drawing the paint to the details. If you can get your hands on the July/08 FSM, there's an article in there.
One thing I will point out is that I have had disasterous results using "Weber Natural" turpenoid (refer to my thread in the Techniques forum)...it dissolved the Future and the Tamiya paint! Regular Weber Turpenoid is suppose to be good though...
Good luck with your first attempt...I hope it goes better than mine did!...lol
Cheers