I feel your pain.... A black car is a another full time job.
I own an 11 GTS black on black. Its a full time job keeping her glowing! Fortunately I have a love for detailing.
Every 6 months I will give her a full correction, wash, clay bar, wolfgang uber compound, wolfgang polish and finally wolfgang sealant with a PC. It takes me a solid 10 hours. Its a labor of love.
I have noticed the little chips as well. I can reduce the visual impact of many of them through this detail process. However the real deep white ones I have touched up.
My touch up process is also a little intense cause I am nuts and look at the panels of my car under 5000 watt shop lights. lol.
I bought black touch up paint with clear mixed in from FM/NJ. I will clean the chip, fill it in, then dry it with a hair dryer. Making sure I put a little more paint in the mark so it looks like a pimple. Then I will lightly sand it with 2500 grit paper to level it, then hit it with the compound and polish and sealant. Results are simply stunning. Blends perfect. Check out you tube for the process.
However I had a friend at a car show simply hit some of his chip marks with a black sharpie and it was very acceptable. The white color bumps look terrible.
The other alternatives would be to get the panel resprayed, I am not a fan of that at this point because I can buff and fill and seal. Or get the bottom areas wrapped? This is very interesting to me because they may be able to match the color very closely and just wrap the lower portion of the door panels. If you can not see the seam this would be ideal.
They make awesome coatings from what I have heard, Opitcoat etc. but the key is to make sure everything is perfect before you seal, so you will want a complete correction and touch up first. Something like that is probably gonna cost you 1,500 - 2,000 for the top guys in your area. Again awesome choice.
Lastly you can cover the area with clear film to prevent more chips but again you may want to fill in and or correct the area as best you can.
Ulitimately I will do the best I can knowing that black cars are the toughest cars to maintain! AND our cars kick up a ton of rocks.
Perhaps someone could design some cool looking mud flaps. lol
Good luck with your chip removal! CM