Do I need to remove the old grille or can I install this over it?

You'll need to remove the original grille first — this mounts at the same factory points, so overlap isn't an option. Unbolting the old one takes 10 minutes with basic hand tools.

Will the black molding trim need touch-up or protection after install?

The molding comes pre-finished. Once installed, treat it like any exterior trim — standard car wash and wax keeps it looking good. No special prep or sealing required.

Does this come with all the bolts and clips I need, or do I reuse the original hardware?

Reuse your original fasteners — the grille assembly only includes the grille itself. Your existing bolts and clips will work at the factory mounting points.