HELP/PAINT: How do I turn an old chalkboard/blackboard into a brand new looking whiteboard?

Prime the chalkboard with a color (white in your case) primer and paint with 1-Part Dry Erase Paint. WriteyBoard 1-Part Dry Erase Paint can be used as a separate primer coat; since most of the primer layer may absorb into the surface and seal the surface, the primer coat is in addition to the recommended number of coats. You can use either the Clear or White 1-Part Dry Erase Paint.