how to remove stains from vinyl?

[doron40]

hello all.
i emptied my pool 2 years ego and stupidly enough i folded the vinyl and left it outside in the winter rains and summer sun. now there are brown stains that wont scrub out. i tried putting bleach on a sponge and scrub but the stains couldn't care less. any suggestions?
thank you.

 

[Patrick_B]

Welcome to the forum!

You might try a dilute solution of Muriatic acid on the stains to see if that helps, but I'm not sure what to suggest beyond that. Sorry I don't have a better answer.

 

[kimkats]

Magic eraser? Just use care as it can be quite abrasive.

Kim

 

[doron40]

the Magic eraser sponge did nothing to it. also tried bleach gel and let it work for 10 minutes, nothing. not sure what Muriatic is and where can i buy it (not on line it will take forever).
i included a photo, maybe someone can identefy this monster.
tnx again for all the help.