if the nicks aren't down to the bare metal, what you can do is to clean the nick up with some fine sandpaper and wet rags (or varnish remover if it is badly stained with adhesive (as was the case when i took off my door ding strips)), and then fill the nick with several layers of paint until the nick is flush with the rest of the finish (allowing each layer to dry for about 10 - 20 minutes between applications and the final coat for 24 hours). to minimize goopy bubbles, i've found that a dabbing motion yields better results.
when you're done, add a few layers of clear coat using the same process until the finish is flush with the rest of the surface, waiting a full 48 hours after the final coat is applied. then, using a very fine 1000+ grit sandpaper made for wet sanding, wet sand the final layer down using straight sanding motions (and not circular) to smooth-out the paint. finally, use a little rubbing compound or scratch remover on the area. it's a bit of work, but if you do all of those little nicks and scratches at once, it won't be too bad.
Leigh
