In my biannual deck sanding and staining adventure I noticed a lot of black stains on my cedar deck. I ruled out mold for obvious reasons and my internet searches have led me to believe that "metal" has gotten into the wood and is reacting to the salt. I've had metal staining issues in my fiberglass pool and I know metal is "around".
Since my other deck far from the pool and built at the same time and with the same material doesn't suffer from this affliction, the salt water looks like the likely culprit.
Has anyone else experienced this issue?
As always, many thanks!