I'm most probably getting an AE RC18T2/B2 kit...
It comes with 2 unpainted lexan bodies...
Now this is the first time i'm building a kit so I have absolutely no idea how to paint a lexan body and I really don't wanna run it unpainted... 

Check out this link:

http://video.google.com/videosearch?hl=en&client=firefox-a&hs=SIb&rls=org.mozilla:en-US:official&channel=s&oq=&gs_rfai=&q=painting+lexan&um=1&ie=UTF-8&ei=mvigS_blF9K7rAfEjomFDg&sa=X&oi=video_result_group&ct=title&resnum=1&ved=0CA0QqwQwAA#

Regards,

VC

Any idea where I can get spray paints in BAngalore?

Well i really don't have an idea where you could get Lexan Spray Paints. But i have tried painting one of my r/c car bodies with Bosny Spray Paint. The job really looks good and isn't showing any signs of cracking. Actually the Bosny Range is not just limited to Automotive paints, but also extends to Acrylic paints which i think are suitable for lexan bodies. The Acyrlic range includes laquers, shimmer, glitter, flouroscent, and glow paints.
Try Them, The first coat is very important as you need to get a very even coat and no residue or droplets.

Some Tamiya spray paints are available at Rotor Sport Chennai

@Ajo
Could you please give me a link?
@xplosify
Where do you get these paints?

@divyam: The Bosny paints are available at a lot of stationery shops and hardware shops. Need to be careful on what u choose. It needs to be acrylic based.