[Игорь Гурьев]

Theoretically still be a cotton swab soaked with vodka in half with water , but be careful , you can hurt the paint layer .

And to walk lightly on the alcohol mold.

Added after 5 hours 9 minutes
And, perhaps , it is a hair dryer from a distance in the direction of mold, so she was not good to begin with ... that dried up , so to speak ...

I emphasize that these activities can be done only in respect of not overvalued paintings ...