While i think the stock minis out the box are a great gaming standard i've shied away from doing major repaints as one of the things I love about x wing is i spend 90 per cent of my time playing it 10 per cent painting it.... whereas with warhammer it's the other way around.
I did repaint Kath Scarlet entirely for my wifes force (yeah i've got a gamer wife.. i know thats rare and i know i'm lucky 
)
Anyway here are a few. Mainly its just engine glow (shuttle and firesprays) but the Corvettes red engine bands were asymetric and it bugged me so I removed the engines, repostitioned them and while i was there made them 'film orange' (or as close as i could get). I also put some 'glow' on the bridge, some more blaster marks and made the scanner and turrets a bit more interesting...added a bit more red here and there etc.
Gave my transport some colour bands too to unify the force look.
Anyway, here they are, hope you like them
Transport
Firespray (slave 1 and Lambda)
The shuttle also had the guns redone and some fleet markings, an aurebesh 'H' for my surname and 'Harbinger Fleet' (all ships from the ISD harbinger in my game world) so as not to get them mixed up with mates.
Tantive Bridge
Tantive batteries and turrets
Tantive Engines
My only full repaint to date, kath's Firespray
Loads of ships have tiny additions like all my xwings have different coloured astromechs but you can barely tell in pics!