Has anyone tried the Quixx High Performance scratch remove? Results?

I was washing my car and the micro-fiber mitten I use caught some dirt and left a 2-foot scratch on my tunk lid deep enough to feel with my fingernail.

I've tried Nu-Finish Sratch Doctor and Meguiars Scratch-X but the results were not great. Hardly saw a difference.

Any tips on more effective application is also appreciated. I've a black car too...dang.

 

Actually, I use Meguiars Scratch-X and it works excellent! Just the other day, my wife's car got some scuffs/scratches all down the front fender that looked like it was down to the primer (about 3" wide x 6-7" long). It might have been a shopping cart or something. I thought we'd have to take it in to have it re-painted, but I tried the Scratch-X and amazingly it took it ALL out to where it looks brand new. I couldn't believe it. I've used it on small scratches in the clearcoat from washing my car, but never thought it would do such a great job on that huge scratch. The trick is to rubadecent amountin really good (up, down, left, right, and in circles) then let it sit for about 1-2 minutes. Then buff it out. Repeat the application if any scratches still remain and eventually, they will all come out.

 

Good info Doc.....Thanks.