Hey all, I finished cleaning my patio though when a part of the concrete was drying I noticed darker circles! Any idea what I could use to remove them?
Did you try any chems on it yet?
Yes, I pretreated the patio and did a 50/50 mix with my 1 gallon pump up sprayer 10% SH and rest water! Makes me wonder if the patio is just old!
What does it look like once it’s dry?
