Therefore I finally decided to purchase some magnetic foil (0,5mm) and to try to magnetize my figures.
It turned better then I expected. 2 sheets of metal foil (200x300 mm) were enough to accommodate my complete Skaven army (unfortunately Jatacenje is mostly WHFB meeting) with enough space left for some additional figures that might be useful.
All packed and ready to go.
Since this can be a good way to store figures, I think I will magnetize all my Napoleonic soldiers next...