dr. color chip???

I have been looking through all the older threads in this forum and have found a few that mention "dr. color chip" as a good way to repair paint. Has anyone used it? It seems expensive but if it really works it would be worth it.

what part of the body are you trying to repair

Both of my vehicles have some things I'd like to touch up. There are scratches on the doors: they are fairly deep, but small (1-2 inches long). There are also rock chips on the hood. Some of which are really deep, I'd like to fix them before they start to rust. I'll post some pictures in the next few days. Also, the area just below the doors (on my '99) on either side has several rock chips. I'd like to repair these because my '93 had the same problem and now I've got lots of rust down there.

Here are some photos of the blemishes I'd like to repair:http://files.automotiveforums.com/gallery/watermark.php?file=/503/455507100_2101.JPGhttp://files.automotiveforums.com/gallery/watermark.php?file=/503/455507100_2103_copy.JPGNASTY!
http://files.automotiveforums.com/gallery/watermark.php?file=/503/455507100_2109_copy.JPG
Any Advice?? These are just a few of the spots. Another is a small rock chip in the hood, it's deep and about a quarter of an inch across.