I am not sure how long he worked for Jaguar, but that was all they used at the shop. No damage to clear coat according to Tom. He says he's used it on every car he's owned for the past 15 years with no clear coat issues. I think the finish is competitive with everything else I've seen. I know when I used it on my proton it looked like a new car again, and that is something the few other products I tried couldn't seem to acheive. My girlfriend just did her '02 Frontier and it looks fantastic too (she's a little fanatical about her new truck). It really made the dark green seem to glow. What impressed me the most is how the metal "feels" when you're done. Most wax products i have experience with leave this odd little build-up that you can feel. Collinite's makes the metal feel smooth. After application the finish has like no resistance. It's pretty cool. I've never tried zaino so I don't know how the two compete, but let me tell ya, I'll never use Zymol again.