RE: Rusty Tracks
Indeed. The photo makes the rust look like you used red paint instead.
I'll second the suggestions made by navspook and dinodog. You might also add a wash or two of extra dark brown or black to make the details pop out not to mention the inevitable dry brushing with silver, only in a minimal way though.
Please post more pics as you progress through your detailing. [sm=thumbs_up.gif]
-Harq