Srekar, you might consider Nelson Hobby paints and HVLP spray kit, I personally have not used the Nelson stuff but have read some possitive threads about it, a common comment is its a little dull compare to the automotive clears. It's non toxic qualities may be good for your situation. Check out the links and see if it fits your needs.

http://www.nelsonhobby.com/spray.html

http://www.nelsonhobby.com/paint.html