San Francisco has a chronic public urination problem. They’ve tackled part of it with pee-resistant paint.
My guess is that people realized that the walls will bounce their pee right back at them, so now they seek out elevators to pee in. Why not just treat the elevators with the same paint?
The liberal solution would be to offer classes, counselors and outreach to encourage people to pee in bathrooms, likely with a multi-million dollar budget.
I’d favor a chemical compound that reacts with urine to form a toxic cloud in the elevator cab.