The toothpick method will give you the best results because
you can get a much smaller portion of paint applied directly to the
problem area and with much finer control. This is regardless of how
the paint is purchased from Toyota. I have applied just enough to have a slightly raised bubble of paint. When it dries it will be very close to the
original paint depth. A deeper gouge might require more than one application. Good luck.

Alden Bowles
2005 Toyota Prius II HSD