Do these bolt directly to the factory bumper mounting points?

These are designed for direct fitment to OEM locations. Verify your current bumper condition before install — if you've modified the rear bumper, test-fit first to confirm clearance and hole alignment.

Will I need to wire these into my existing electrical harness?

These are bolt-on assemblies. If your vehicle's factory harness and connectors are intact, connection is straightforward. If you've removed or damaged the original wiring, you'll need to source the compatible connector or have a shop splice in new leads.

Can I polish the clear lens if it gets scratched during install?

Light polishing with fine compound can remove minor scratches. For deep damage, replacement is cleaner than attempting restoration — these are cheaper to swap than repair.