Do I need to remove the bumper or grille to install this?

Mounting method not specified — test-fit your assembly first to confirm access points. Most OEM-style Accord headlights bolt directly at factory mounting locations, but your specific model year may vary. Check your service manual or consult with a shop familiar with your year before committing.

Does this come with bulbs?

Bulbs are not included. You'll need 9006 and 9005 halogen bulbs, which are standard parts at any auto parts store.

Can I paint or prep this before installing?

Since this is a hard panel assembly with integrated housing, any prep or finish work should be done before installation. If you're planning a custom finish, handle it now while it's loose. Once bolted in, access becomes difficult.