What suggestions can you give to keep cat facial scratches from scarring?

Keep it clean: Wach it several times a day with soap and water, apply triple antibiotic ointment. Once its healed use silicone sheet (from your drugstore) and massage it firmly several times a day. Keep it protected from the sun.

Under normal : Circumstances, superficial scratches rarely scar. Use aquaphor and then when healed mederma.

Good habits: In addition to the other answers, healthy lifestyle and good diet that includes sufficient vitamin intake and complete avoidance of cigarettes plays a large role in good wound healing. As does avoidance of sun exposure to the area. This applies to scratches, cuts, surgical scars, etc..