I just got my patrol car... 2003 Crown Victoria. The paint was very nasty. Seeing that I wanted to clean it up, but not have to detail it like it was my POV, I chose to use NuFinish on the car. I use Zaino for my POVs and I have Rejex for the windows. I know that Zaino is very picky on how the paint must be prepped and I did'nt have time to apply Rejex out of the sun and keep it "protected" for 12 hours. I used a brand new brick of claybar and by the time I finished the entire car, the bar was destroyed and could no longer be used. Having said that, there was still a little dirt and stuff on the paint, but the NuFinish took it right out. I was also worried about it damaging the reflective decals, but it actually cleaned it up and didn't stain. I will have to say that NuFinish gets an A+ for this type of detail for its practicality. Now I will see how many auto car washes it can go through and see if it can live up to its one year/52 wash claim.