Gents? Reposting because I have received any replies yet.
Some additional information. I was caught in a sudden storm. So the marks were left by just rain nothing else, it's been About a month now the darkened area is still there, has not gone down yet.
I found some info of dealing with water stains on regular leather but was wondering if the treatment of shell cordovan is different.
FYI, shoes are park Ave, AE. In natural shell.
If that makes any difference.
Stains like this on lighter shoes is usually a sign of the leather reacting to a higher pH than it was intended for. Most leather wants to be in a range of between 3-5. Vegetable tanned leather (like shell) probably on the lower end of that spectrum. Water being somewhere around neutral will lead marks because the leather almost acts like litmus paper. I suggest mixing 1/3 white vinegar with 2/3 distilled water and give it some elbow grease with it. Let it dry thoroughly. If it is still there try it one more time. Still there? You may have to wet a piece of paper towel wit the solution and literally stick it to the shoe and then wrap it in saran wrap to control some of the evaporation. Let it sit like that for several hours (up to a couple days sometimes). Then peel the paper towel off, which should be crispy-dry. This usually will usually help lighten the shoes up again. Polishing will even out the color. Good luck.