I had my door dings (professionally) removed recently, using the paintless dent removal process. I have many paint flaws, and chips where the hardtop has been poorly aligned during 30 years' worth of removal/replacement. But for some reason, all I could see when I looked at my car, was the silly door dings. So after 15 years of ownership, I finally took it to Dent King here in Vancouver. $400 later, and I am immediately regretting not doing this when I bought it. I can't even tell where the dents were.
So I then decided to tackle the remaining paint chips on the passenger side door and front fender. For those that are not comfortable sanding their paint with a 1000-grit block, then I suggest you leave it to professionals. But for those who are handy with rubbing compound and an orbital buffer, it's an easy job.
With a black car, it was simple to find touch-up paint. I simply dabbed paint into the 1/2 dozen or so chipped areas until the new paint exceeded the surface of the surrounding paint. I let each application cure for a day or more between applications. The small chips took about 3 coats, one the size of an pencil eraser took about 5, and a large dime-sized one took around 7 coats. Once comfortable that all dings were completely "overfilled", I set to work with a 1000-grit Meguiars unigrit sanding block. I soaked mine in a dish of water, then used a little car wash soap as lubricant. With light pressure, I worked the block back-and-forth on the affected area. I add more soap often, and checked the surface by feel. Once there is no shiny area around the paint bump, and the area feels smooth, I wipe down the area and see if there are any prominent scratches from the block. A few more seconds of irregular sanding motion gets rid of those. I then use rubbing compound to remove the hazy scratches, then switch to a finer polish to bring up a glassy shine. All I had on hand was Meguiars swirl remover, but now my dings are gone and the door shines like new.
I'll do some more touch up work over the winter, and then will do a full polish and wax with my orbital, but for now, I'm thrilled with the way it looks. I'd post pics, but I didn't have the photographic skills to capture before and after images of paint imperfections.