Will these bolt straight to my existing mounting points?

Yes, these mount at factory rocker points with no drilling required. Line up the bolt holes and you're done.

Do I need to seal around the bezels after install?

Weather sealing depends on your cab condition. If your original mounting area was sealed, match that same method. If moisture wasn't an issue before, you don't need to add it now.

Can I repaint the chrome finish if it gets damaged?

Chrome can be refinished, but it's labor-intensive. For light scratches, polish with chrome cleaner first. Deep damage usually requires professional chrome replating or a replacement assembly.