Ciao,
Let me apologize for the lack of before pictures but imagine a classic rock chip on the hood. The kind that is deep enough that I could begin to see some hints of rust forming.
Bought the Dr. Colorchip kit (basic) to match my car color (on the left strut mount in the engine bay, in my case A08 Silbergrau Metallic).
The kit comes with a good description of the method. In a nutshell, you dab the paint on the prepared (cleaned) surface. I use the brush provided rather than the glove provided.
It dries quickly, with excess of paint all around the chip (that's when you go hummmmmm ). That is OK though because after 30 min-1 hour, you come back to the globs of paint (and the paint left in the crevasse of the chip) and you open up the Sealact solution (provided in kit) dabbing a little bit on a clean cloth (provided in kit).
My contribution to the technique here is to NOT use your fingers to rub the Sealact solution on the chip. Instead, I use a small block of wood (flat :wink) wrapped in a clean cloth (provided in kit) and impregnated with some of the Sealact solution. Add more Sealact to the cloth and eventually the excess paint around the chip goes completely away. The finger doesn't work because it also erodes the paint that is inside the chip (too soft - hence, the flat block of wood).
I usually wait 12 hours and do a second application. I am up to 5 applications on the chips below.
It looks better than the raw chip and the color match is amazing. I have done smaller less deep scratch and that works very very well too.
Here are some "fixed" chips.
With patience and several more applications, I bet I can get them filled all the way.
Perhaps consider buying the Standard kit (rather than basic) as it gives you more of the Sealact solution (you'll run out of that before you'll run out of the paint).