How to remove walnut stains from boat interior?

Question

The cause: One summer we left our uncovered ski boat under a walnut tree, the walnuts that fell left these blackish green stains on the vinyl interior of the boat.

The problem: We can't think of anything to get the stains out, we tried windex, and all the multipurpose cleaners, spray it on then scrub it with a rag.

---------------Please help, need a solution if possible.------------

Answer 1

i used to have a problem like that, think i used a vinyl restore product on it. hope it helps it was a couple of years ago, or a boat store should be able to tell you

Answer 2

try WD -40 it removes ink stains