One clean it with a solvent.
Two, using a black touch up bottle from any parts store, fill in the area with the black, but not completely to the top of the scratch.
Three, let dry for an hour or two.
Four, apply a coat of clear, let dry for 30 minutes and then apply another coat, making sure it is slightly higher than the factory finish surounding the damaged area.
Five let dry to a couple of hours.
Six, using 2000 grit wet or dry, fold over a soft, flat object like an eraser, and after soaking the paper for 30 minutes in water, carefully wet sand the built up area down to even with the factory finish.
Seven, do not get "agressive", just get it flat.
Eight, hand compound the area with a light clearcoat safe compound to remove the sanding marks.
Nine, then polish with anyones polish to remove the compound marks and wax or seal the area.
If you don't fix this, the salt from the roads will quickly eat away the primer and ecoat and then you will see blistering of the area and an expensive trip to the bodyshop for a $100 to $300 repair.
It is not difficult, if you feel unsure, go by a body shop and they'll give you a peice of cut out metal that is painted, doesn't have to be the same color, use the black on it, and practice the procedure.
Matter of fact a different colored panel would make it easier for you to understand the fill and sand methods as you can see exactly how far you can go etc.
Ketch
:up