Vinyl stains
 

All,
I've got several areas of outside vinyl upholstery (bow cushions). Every year (but this year is the worst) I get pink(ish) stains that I cannot remove, despite trying every sort of cleaner I can think of. I can remove these cushions for cleaning so I'm not limited to lake-friendly sorts of cleaners. Thoughts on what this might be and how to clean?

Could be sun screen, I've been told there is also pink mold but I've never seen it.

https://gestaltscientific.com/ This is a relatively new product that's supposed to address the problem. Have not tried it.

Thanks
 

Have ordered this product. A review by a reputable boating magazine was positive. Will post my own review after I try it.

I wonder what causes that pinking?

It's a mold

Try using Soft Scrub. Apply to a sponge/ towel . (do not apply to he stain on the cushion) Wipe the area and rinse.

Pink Away Home Solution - Review
 

All,
So I did try the Pink Away product. There can be several causes of "pinking" but the most onerous is mold, which is what my vinyl had and which I could not remove or even diminish with any of the typical methods. The Pink Away product only works on mold, not on other types of stains. The bottom line is the product worked very well. It takes several applications, which must be done in bright sunlight.
The downsides are as follows:
1. The manufacturer (Gestalt Scientific) seems to be a start up, who are scaling up to more of a high volume supplier. Their customer service isn't the greatest, and my order took over 2 months to arrive.
2. The product is quite expensive.
3. The product has a limited shelf life (although they improved that recently).

Hope this helps anyone else with this issue.

Speaking of cleaning products here, I realize it's a little off topic, but just wondering if anyone has ever tried a product called F11? I get "pop ups" all the time for it when I'm on the computer, and it looks like good stuff, but it was very expensive, so I would like a few actual "customer" reviews of it before I splurge on it. I don't mind spending the money for it, if it works, I just don't trust the customer reviews on line.