ONLY use comercial tint!! Whether you buy it from a local tint shop or have it done at a tint shop. We've tinted hundreds and hundreds of windows and the comercial grade is the only thing we use as it is FAR superior to anything you buy in a store. I can get you part #'s if that would help you out! On my 94' I went with limo tint over the factory 20% tint on my back and rear side windows and that is about perfect. IIRC you are from MN so be carefull on how dark you go with the front side windows because legally your not supposed to have over 50% on ANY windows, although they are very leinent on the rear windows, however the front windows being to dark WILL get you pulled over!