I just did something similiar to my hood and trunk of the Jag which has a metallic black paint, now 6 years old with its share of scratches on the trunk from a$$holes. Two large "patches" of scratches from a) someone who decided to set some heavy object on my trunk and slid it off and b) where someone spilled a drop of something nasty on it and rubbed like mad to remove, which looks like a circle of perfect paint surrounded with two large sections of scratches in the shape of a V where they were rubbing like mad. And these two patches appeared in the space of less then a week apart a couple weeks ago. DAMN IT!
I mostly removed these two days ago and here's how I did it. Since I wash and wax my daily driver once a week and use a duster and a cover daily, I'm nothing short of a fanatic about detailing. Everyday is a show day for me.
If its deep enough to catch on a finger nail, even with rubbing compounds, its going to be tough to remove without using a high speed polisher or wet sanding. Both best left to the pros. Anything else, you can use these products and they ARE clear coat and paint safe. A clear coat is a layer of paint without pigments, anyway.
I used Meguiar's Medallion Paint Cleaner to remove the wax. I used 3M's Rubbing Compound (good for 1200 grit scratches) to remove the deeper scratches. The key to remove a scratch, or when waxing for that matter, and done by hand is stay away from circular motions and use straight lines!!
I chased the compound with 3M's Swirl Remover (good for 1500 grit scratches) and 3M does make a variant of their Swirl Remover specifically formulated for dark colored cars. Finished the prep work with a glaze (Meguiar's #7 Show Car Glaze or Omega Glaze; both are great IMO). Finished with a coat of Pinnacle Souveran and then another the following day after it cured.
The 3M compounds are some of the best, based on how widely they're used and the reviews they get. I personally love them.
Because I can still faintly see these scratches, and I "know" there there all the time, I'm thinking of having the whole damn car wet sanded and clear coated for me to polish out again.
Good luck,
Sunny
[This message has been edited by JaguarXJ6 (edited 13 January 2003).]