Artists brushes are much much easier to use than toothpicks or the brush supplied in the bottle of touch up paint. You can pick a variety packs in multiple sizes for $3 at any craft store. Using the larger brush in the set, start w/ the largest chips/scratches. Steady your hand by placing the heel of it on the surface. Work your way down using the smaller brushes to the smaller chips/scratches. Once they're all filled in (your finish will look like chicken pox for a few days while you complete this) apply the clear. Sand down and polish. Grizzly's write up is very good. If you're looking for a quick fix, try either the Dr. Colorchip or Langka approach but for a lasting fix that will hardly be noticeable, use the Grizzly approach
