Best white paint on Trish's tank top?

Hi everyone. So I'm doing a custom Niki Bella and I need to paint Trish's rubbery tank top white. I don't customize a lot but when I have I used that 98 cent acrylic paint from Walmart (it has an apple on it) Anyways, once it dries it's always rough and seems like it'll flake. I feel like it'll be even worse on this rubbery surface. What can I use that will look bright white over the black and will have a smooth factory finish? Thanks for any help!!