NAIL HEAD RUSTING:
The rusting of the exposed heads of iron nails. It can show through and discolor the coating covering it. Can occur if bright nails, rather than galvanized, are used outdoors.

NAP:
The fibers on a paint roller cover.

NAPHTHA:
A petroleum distillate solvent used mainly by professional painters to thin oil-based coatings and to clean up.

NEUTRAL COLORS:
White, off-white, light beige and gray - colors that generally go well with all other colors.

NON-VOLATILE:
The solid portion of a coating consisting of pigment and binder; it is the portion of the coating left on the surface after it is dry.