 There's even oxidation on vinyl, so you might remove some of that, so it might kind of clean it up a little bit. But if you put that on, it's a lot slower acting than the old-fashioned paint strippers. So that particular paint is not a real super durable or stain, not super durable. So I'd paint it on there. I'd try and do it early in the morning or late evening where it's kind of cool and not a hot finish.