How do I protect painted floors?

We recently painted over our worn hardwood floors in the house, because we could not effort to have them refinished. We used a good porch and patio floor paint from BEHR, two coats in a walnut brown. It looks very good, however, it is so sensitive to scratches, scuffs and dirt. You see every footprint! If I wipe it with a moist rag, you even see the wipe! (It says its not supposed to get washed until it cures after 4 weeks). Is there anything I can do to protect the floor and make it less sensitive? Cover It with polyurethane? Or do I need to remove the paint and actually refinish the floor?
q how do i protect painted floors, flooring, hardwood floors, home maintenance repairs, how to
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