Is it a completely covered porch? We would recommend spraying the iron sections with matte polyurethane spray to prevent further rusting. The item isn't coded for outdoor usage, but if you feel that it is adequately covered, you may try- however we cannot be responsible for any damaged caused by outdoor usage. Thanks so much for your interest in us!

I think the question is whether the fixture is "listed and labeled" for damp locations. Not whether the finish will hold up.

National Electrical Code

410.4 Luminaires (Fixtures) in Specific Locations.
(A) Wet and Damp Locations. Luminaires (fixtures) installed in wet or damp locations shall be installed so that water cannot enter or accumulate in wiring compartments, lampholders, or other electrical parts. All luminaires (fixtures) installed in wet locations shall be marked, “Suitable for Wet Locations.” All luminaires (fixtures) installed in damp locations shall be marked, “Suitable for Wet Locations” or “Suitable for Damp Locations.”

Definition- Location, Damp. Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture. Examples of such locations include partially protected locations under canopies, marquees, roofed open porches, and like locations, and interior locations subject to moderate degrees of moisture, such as some basements, some barns, and some cold-storage warehouses.

Definition- Location, Wet. Installations under ground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather.

It is not damp certified. Damp certified requires wiring to be encased in a certain way, and this one is not. hope that helps!