ᐅ Mold on travertine flooring caused by painter’s fleece and stored buckets

We were quite shocked... our bathroom was used as a storage room for various paint buckets and the like. To protect the floor (natural stone/travertine), painter’s fleece was laid down. Now that we have cleared out the room, we were alarmed to find mold growing in some areas. The fleece and the buckets likely caused residual moisture to accumulate from the floor. Fortunately, the affected spots are small, and we have probably prevented more serious damage. From now on, the painters will only use painter’s paper.

Does anyone have an idea how to remove these stains?
Mold remover did not work at all. Best regards, Steffi33

Contact your stonemason.