Kate McKinnon is always an inspiration on lots of levels. She has recently published a video on her blog about safe working using metal clay. She talks about working in a more safe and clean way, producing less dust, using safer support materials and as usual, everything she says is clear common-sense. It is well worth the few minutes it takes to watch this video.
Working as I do with enamel I am always careful when teaching and verge on the obsessive about my enamelling students wearing their dust masks.