Will this interfere with the trunk seal or lower bumper clips?

No — this lip is designed to work with the factory bumper assembly. Verify that your OEM bumper is in good condition before installation, as a damaged bumper may not sit flush with the new lip and could cause fitment gaps.

Can I use adhesive instead of drilling through the bumper?

This lip uses factory mounting points, so adhesive alone is not recommended — you'll need fasteners at those OEM holes for secure hold at speed. Sand and prep the mounting surfaces on both the bumper and lip before assembly to ensure a tight fit.

What should I do before painting?

Sand the entire surface with appropriate grit to profile the finish, then apply your chosen base and clear coat system. Make sure to mask off any mounting holes and underside surfaces that won't be exposed. For best adhesion, work in a clean, dust-free environment and follow your paint manufacturer's cure times before reassembly.