I just finished trying this stuff on my blue 350Z. I'm very picky about results and what most people have posted here about the the colorfill coming right off with the FTC is true.
My car has a good variety of nicks and chips of varying sizes all the way down to one that looks more like someone pressed the corner of a razor blade edge into the paint making only a tiny slit. Another chip is about the size of this letter "o" (that's the actually size) and maybe as deep as the thickness of a piece of paper. When I started it was white primer. The colorfill turned it blue and after wiping it with the FTC, it ended up light blue.
To be honest, none of the chips were repaired to my satisfaction, so I turned around and used the procedure outlined in the tutorial here on Autopia for repairing chips...
Clean the hole.
Abraid the area around the hole with 2000 unigrit on the end of a pencil eraser.
Fill with touch up paint using a toothpick. This is difficult as the touch up paint is very thick (I thinned it with laquer thinner).
Let dry for one week.
Wet sand with 1500 unigrit block, followed by 2000 unigrit wet sand paper to even the surface.
Polish with 3M Perfect-It, followed by Swirl Mark remover.
Wax or glaze.
Finished.
I have to wait a week now that the paint's been applied. I will follow up with the results. I also have a very large area of damage where some idiot chipped the paint where you open the fuel door. He must have hit it with the fuel pump nozzle. I've been slowly building up the chipped area with touch up paint and it's now ready to be wet sanded down and polished.
I have used Langka with mixed results. It seems to work better but for dark paint, it tends to make the touchup paint lighter after using the blob eliminator. Looks like you get what you pay for.
scrapser