KIWIKIWI Shoe Whitener | For Leather, Vinyl, Canvas, Nylon and More | 4 Fl Oz | Includes Sponge Applicator

I have a little black mark on my Nike shoes it's on the white checkmark will it cover it? It's a almost rubbery surface?

Does this clean or cover?

Looking for a sneaker cleaner--not for the fabric but for the white rubber sidewall that runs around the shoe. bulit-in brush would be great.

Will my shoes be crunchy when the paint dries?