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Back on topic, Kommando J, how many unpainted miniatures do you have? What scale are they and across how many periods?I keep my lead piles in box files along side the painted troops in each army. Not in bags but open shallow boxes such as you get from the Perrys or cut out from blister packs. I find this encourages me to get them painted. If they were all together in one big pile on my painting table, I think I would find it demoralising even if organised into a compartmented box.
I mainly use 4l RUB, some with the inserts, and some plain, in these I keep the figures in bags.