Good tips guys! I also use watercolours and artist's pastels (blacks, browns and dark greys, depending on the area I'm working) for staining, shading, etc, aswell as Chinese ink (black).
I also use some womén's cosmetic tools for modelmaking (..Ivett has to buy them though for me...I'm not THAT brave or crazy!!! ) - A long nail file stick for initial (rough) sanding of long straight seams (wing leading/ trailing edges, etc), some no-shine face powders for simulating mud on truck chassis' etc, and non-acetone make-up remover for smoothing putty joins -(apply to a cotton bud ('ear cleaner') and wipe the join while the putty is wet, saves a bit of sanding later)
hehe I'd just buy 'em and say they're a gift for my girlfriend XD (even though I don't have one TT_TT)