I'm cleaning some veg-tan leather with mildew on it, at this moment. I usually wash the leathers with some cleaning products someone recommended me, and they look like new in the end. Even as a final product. It recovers that regular veg-tan look, semi-shiny, without spots, clean and above all: workable. So, i'm pleased with the cleaning technique i found. Seems to get rid of the mildew, even if it's technically temporary, as it's still microscopically there. Fine by me, as long as it does not show up again as a product.
But i really hate to see the mildew showing up from time to time, on the unused batch of leather. It scares me a bit. I mean, i'm worried for the integrity of the leather, mildew, cleaning, mildew, cleaning... How do you guys usually store the leather? Can we really store the leather in air-tight environments, like johnv474 suggests? Isn't that worse, as the leather does not breathe? I want to store it properly too. Appreciate your help.