Short answer: sometimes, but not always. It really depends on the manufacturer, the material, and where the furniture is going to be used.
A lot of commercial-grade urban outdoor furniture now comes with some kind of graffiti-resistant finish. Metal benches, planters, bike racks, and trash cans often have powder coating, which gives a tough surface that’s harder for paint and markers to stick to. Some brands add a clear anti-graffiti topcoat, while others use sacrificial coatings that can be power-washed or chemically removed without damaging the base finish. Concrete and wood pieces may also get sealers or penetrating treatments to make cleanup easier.
That said, not every piece has an anti-graffiti coating. Cheaper off-the-shelf furniture usually doesn’t, and even “graffiti-resistant” doesn’t mean graffiti-proof. It usually just means the surface is easier to clean. If you’re buying for a city, park, transit stop, or plaza, ask directly: Does this product have an anti-graffiti coating? What type is it? How should it be maintained, and can it be reapplied later?
So yes, many urban outdoor furniture options do come with anti-graffiti coatings, but you should always confirm it with the supplier instead of assuming. If graffiti is a real concern in your area, it’s worth paying for a tested coating system and having a simple cleaning plan in place.