Recently, I redesigned part of my garden and put in a circular self
binding gravel path.
Anyway, now with the heavy rain / downpours, the top surface of the path
looks like it has been picked at. I did use a whacker plate machine to
compact it.
Also, when it has rained heavily, there are limestone splash marks on
the brown plastic edging I used between the path and soil.

I have tried : turps / white spirit,weak mix of bleach in water, and a
proprietry stain remover, albeit for fabric. I have also used just a wet
/ damp rag, but no matter what I have tried when the edging dries out,
the stains are still there.

I googled my problem but all I got was limescale remover. Is limescale
the same as limestone stains, I didn't think so