Do these mount at factory points or do I need to drill?

These mount at factory mounting points — no drilling required. You'll use existing cab attachment locations for a clean, structurally sound install.

Will stainless steel stay shiny or does it need polishing?

Stainless steel resists corrosion and oxidation naturally. It'll maintain its finish with occasional rinsing. If you want a mirror polish, use stainless steel cleaner every few months — but it's not necessary for durability.

What hardware do I need to bolt these on?

Mounting hardware is not included — confirm bolt specifications and sizes against your truck's factory attachment points before assembly. Your F-150 service manual will specify what you need.