If it is on any interior plastic,except on foam backed plastic dash boards ,there is a repair method that works. Unless the plastic has a very deep scratch this will work to hide,or in some cases eliminate the scuff or scratch. This will work with most theromplastic material.
Take a heat gun ,or propane torch ,and heat ONLY the scratched area. Be VERY careful not to hold it at the same spot. Wave the heat source over the scratched/scuffed area. The scratch in some cases will disappear . Only heat enough for the scratch to disappear,and not until the plastic gets shiny,as you are melting it then. Light colored plastics will yellow when heat applied,but darker colors will not. Do not touch the heated area because it will imprint whatever touches it,just let cool. DO NOT USE THIS METHOD ON PAINTED PLASTIC, ONLY MOLDED PLASTIC. Painted plastic should use touch up paint,and micro sand 600/1500 grit touched up area to blend in.
I use a propane torch with a pin point flame,quicker heat, narrower heat point,and easier to control . It's an old kayakers trick to clean up scratches on plastic boats.
As for protection I use 303 protectorant. Several applications give good scuff protection,and when applied to scuffs,will help hide them. Remove any protectorant before using heat method,as it will change color of heated area. Use rubbing alcohol to remove protectorant.