Yes, PVC Ceiling can be cleaned up to as many times as you can !

You can use a normal cloth to wipe the PVC Ceiling until it shines !

(Ps: You can use Zip to wipe off tough stain on the PVC Ceiling too)

Yes ! You can use scotch brite stick to wipe the ceiling !

No, PVC Ceiling will not turn yellow as it is 100% waterproof !