Do these fenders work with any wide body kit, or is fitment specific?

These fenders are engineered to integrate with a complete wide body kit. Verify that your kit's front overfender specifications align with the 85mm width before ordering. Check with your wide body kit supplier if you're unsure about compatibility.

What surface prep is needed before painting?

Sand the surface with appropriate grit to roughen it for paint adhesion, then clean thoroughly to remove all dust and residue. This prepares the FRP for your chosen primer and topcoat system. Follow your paint supplier's prep guidelines for best adhesion.

Will these mount directly to my existing fenders, or do I need to remove the OEM parts?

As over fenders, these bolt over the factory fenders as part of your wide body conversion. Refer to your wide body kit's installation manual for mounting point locations and fastener requirements specific to your setup.