I'm currently undergoing a respray/refurb here int he Uk on my 968CS. The colour has changed from Grand Prix white to Carrara white, quite a noticeable difference.
Documented in part on 968uk.com
http://www.porsche968uk.co.uk/phpbb/viewto...asc&start=0
I have gone beyond a respray and ended up taking a great deal of the running gear off the car, and interior, and gearbox, and torsion tube and the list goes on. Every bush on the car has been replaced with bearing/solid/rose joint except for the ARB's which are going to be polybushed. Even replaced the bushes at the end of the torsion with the polybronze items.
Back to the respray, i have stripped the doors back to a carcass, front and rear PU's are off and completely taken apart, headlamp units out, all glass out - you will see fromt he photos on the above link the extreme i went to.
Respraying any car properly is a big job, there is a great deal to take off, you then end up refurbing some/all what you remove which isn't being painted. The 968's in particular have a great deal of componenets that ideally need to be painted if the colour is to change; door handles, mirrors, roof side trims, 2 pieces of side trim each side, wheels/centre caps if a CS like mine (8x wheels, 12x centre caps!) rear spolier (plus an additional 3 pieces if like me you have the trim done in the same colour as well).
My car has had door closes done, the 'trunk' space, rear cage, rear of seats (bucket seats), all four wheel arches, underside of bonnet, and most of the rear underside. I did not go as far as the engine bay - it would have added too much cost to the bill. In hindsight i should have had the car completely stripped and then dipped as Pazzer mentioned - i would have had in effect a 'new' shell, could have changed the colour completely, had limited underseal re-applied and perhaps even left the carpets out all together (it is used a great deal on track)
I have spent a small fortune having this work done, i have spent c£1.5k on replacing every seal on the body, fixings, replating, refinishing etc - it adds up.
It is a 'nice' idea changing the colour of a car, but you better have deep pockets.
Jason