Do these bolt to factory mounting points or do I need to drill new holes?

These mount at factory mounting points — no drilling required. Test-fit before final fastening to confirm alignment on your rig.

What prep work is needed before paint?

The textured surface grabs paint well. Light scuff and wipe-down with a clean cloth is standard prep. Refer to your paint supplier's guidelines for primer and topcoat compatibility with hard panels.

Are fasteners included or do I supply my own?

Fasteners are not included with this set. You'll need stainless or galvanized bolts and washers to match your factory hardware — standard sizes work fine.