Steel wool. Plenty information on what grade to use for what, but there's no mention of which grade's recommended for photographers to use for those long exposure shots, where they set fire to some, and swing it about in the dark. Not that I intend to do such a thing. Sorting out, and chucking out, continues at work.

Evenings are brightening up at last, as sunset is no longer in the afternoon... for a few months.