Can I Paint Over Waxed Stair Handrails Car Waxing?? Paint Removal??

Car Waxing?? Paint Removal?? - can i paint over waxed stair handrails

1) I have just a new car, and there is a black mark gray paint on the transparent layer. Can I remove X to zero. If I do I do once the wax, because the car is new.

2) If I wax, I can wash my car and then apply to have all the old wax or wax pay (clay bar), then wax.

There is a kind of vehicle you read a lot, but not half a day to wax.

Thanks