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

These secure at factory mounting points — no frame drilling or reinforcement plates required. You'll use existing rocker panel attachment locations designed into the cab structure.

Can aluminum bars handle regular step use, or are they just for show?

Aluminum is rigid enough for daily entry and exit. It won't flex like plastic, but it's lighter than steel. With repeated heavy leverage or standing full-weight on the edge, any bar can flex — treat it as a step into the cab, not a pull-up bar.

Does the aluminum come bare, or does it have a finish?

The bars ship with an aluminum finish. If you want a custom color or protective clear coat, plan for light prep and painting. Raw aluminum will oxidize over time without sealant.