Do I need fasteners or hardware to mount these?

The fenders are designed for bolt-on installation to factory mounting points. Verify your fastener kit separately or check your OEM service manual for the correct hardware specification.

What preparation is needed before painting?

Sand and prep the surface with appropriate body filler or primer as needed, then apply your chosen topcoat. Work with a professional painter or automotive paint supplier for best results.

Will the wider fenders clear my current wheels and suspension setup?

The 30mm extension is moderate, but verify clearance against your specific wheel diameter and offset before installation. Check both at full droop and full compression if you run lowering springs or coilovers.