Do these fenders require drilling into the body?

No. These panels are engineered to use factory mounting points on your vehicle. Before installation, inspect your body's existing fender attachment locations to confirm bolt hole alignment and condition.

What prep work should I do before painting?

Sand the surface with appropriate grit to promote paint adhesion, then wipe clean to remove dust. Apply your chosen primer and topcoat per paint manufacturer specifications. FRP accepts standard automotive paint finishes.

Can I install one fender at a time or do both sides need to go on together?

The two-piece design allows individual installation. Install one panel first, verify fitment and bolt torque, then proceed with the second. This makes replacement or phased installation straightforward without needing to remove matched parts.