Ryan - there really isn't a too much paint involved at this point. The compression and pipe fittings are done in Tamiya Red (X-7) and Metallic Blue (X-13). I've also used Gun Metal, Light Gun Metal and Model Master Aluminum, Titanium and Magnesium Metalizers sprays.
More than painting, I've used a number of different techniques to finish/polish the metal surfaces (everyting is metal - there is no plastic in this engine). Some pieces are acid dipped, others are sanded and still other pieces get buffed to a high shine using a jewelers wheel. As everyting is metal, the key for me is to surface treat the metal correctly so the right parts look all beat up or nice and clean as the case may be.
Fizz - Thanks for the compliment but, no, it won't run. The steering, suspension and all engine components will work, but not under their own power.
Vapo - I hear that a lot lately.