Okay so I did a 1:1 with my 14% sh. I left it for like 30 minutes and rinsed it off with hose connecter to tap so very low pressure rinse. Came back after 2 days and I see these stains. Did I do something wrong? How can I get rid of them?
Why??
Because when I did 4:1 (water:sh) it did not get off the black lichens. So I tried 1:1 and most of it came off just not sure why there are stains at certain places afterwards as shown in pics.
Might try using a bit of pressure and a scrub brush and see what that does. Not a ton of pressure just maybe 1k psi
Is that slate or some kind of coating on concrete, hard to tell from pic. Just for future reference, takes about 5 min to kill lichen, if that long.
Okay I will try that thanks.
It feels like concrete to be fair.
I’ve got a similar pair of flip flops, mine are black though
LOL, those were too before they sat in SH for 30min.
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