I once Dr Color Chip'd my junker 2001 Kia Spectra, this car was a disaster with road rash, the entire Hood was peppered very badly. One thing I'll say before going further, I was very pleased how well the paint matched, being that the paint was Magenta Pearl Metallic.
One technique described by the company is to pour and then spread with a squeegee. Might be a faster, and easier method, but also figured I'd be going through a lot of touch up paint in no time.
So, I did it a bit harder and slower way. I addressed about a 1 foot circular area at a time, within such an area may have been 12, 15 and more chips, that bad. Took the small microfiber applicator, and dabbed away, insuring that I was filling the chips with enough paint.
Good weather conditions where it was warm and low humidity allowed me to come behind quite quickly, about 10-12 minutes later to level with the Sealact Solution.
Then after satisfied with the leveling processes in each area I moved onto the next area. It might've taken me 2 to 2-1/2 hour's time on the hood, but when I got through, the difference was very evident and pleasing.
After that I didn't touch the hood for a week, then came behind with a sealant (WGDGPS 3.0) after insuring full cure time of the paint. After such efforts, my beater wasn't looking so bad.
Such touch ups, which I'd surmise mine was worse than a lot of vehicles, is something that might take a person a couple of afternoons of some spare time.
For lesser atrocities, one can do a walk around with each body panel, do a close inspection and find any and all chips, mark these areas by placing small pieces of masking tape nearby.
First do the prep, this is simple enough, with a bottle of 70% IPA, insuring all waxes-etc are removed from the chips. Then do the touch up.
The initial outlay of cash for the Kit might seem high, but IMO the end results are worth the cost.