In my experience, almost all prints benefit from some spotting. Keeping film holders, equipment, and darkrooms very clean minimize this. You'll need a very fine tipped watercolor brush and a dye of the appropriate color. Spotone was the standard dye, but may be unavailable now. I've also used Dr. P. H. Martin's inks. Good light and powerful reading glasses help. There should be plenty of online information on technique.

(edit) Wow! Everybody types faster than me! I agree with above information, except distilled water may work better than spit or some water.