Do these plug directly into my factory harness?

Yes. These mount at factory rocker points and connect to the existing fog light wiring — no splicing or relay work needed. If your F-150 came with fog lights, swap is straightforward.

Will these work if I don't currently have fog lights?

Wiring harness compatibility depends on your truck's factory configuration. Check your vehicle's electrical manual to confirm whether fog light circuits were pre-wired but blanked off, or if additional harness installation is required.

Can I polish or repaint the chrome bezel?

The chrome is factory-applied finish. Polishing is fine for cleaning; avoid abrasive compounds that can strip the plating. If repainting the bezel is needed, mask off the lens and use automotive chrome-safe primers and topcoats.