The 
zapper 9000  would be perfect in this application. 
I think it vaporizes finger prints on your shinny paint as well so you don't have to wash the car after.
Or what you can also do is lift the prints off your car, then open a free energy drink  stand with a video camera and numbered cans, and then lift the prints from the cans and match them up with the video and viola, you caught your thief and have all the neighborhood kids finger prints.
Everyone needs a fun hobby
 
		
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				"It broke because it wants to be Upgraded 

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2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP, 
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top  (DD & Auto-X since May 17,2012)