mostly because im an impatient bastard. and i was looking to try the less expensive method first to see if it would work. if it does, then members here would know they could achieve good results without spending the 34 dollars for the color, another 15 for the primer and another 17 or so for the clearcoat. if this works, it costs about 7 dollars total compared to 66 dollars from color-rite. of course, if it looks like crap, i will need to buy another stock windscreen, and try again with the more expensive items. but a lot of members here want to get good results for less money. so i am the guineau pig for once instead of using someone elses already tried ideas.