we use water-borne paint at our collision facility...if you have the right equipment (blowers, blowtherm or equiv. spray booth) it is actually a better product....we use dupont "cromax"....color matches are much more consistent to factory finishes...as far as speed goes we are currently doing between 5 to 8 vehicles per day...the do it yourself will have a hard time with this product without proper air flow...clean airflow is more important than temp.