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Using sandpaper and then tidying up with craft knife is the generally accepted way of cleaning tortillon. However, it's possible that you might be using sandpaper with a low grit level (under 120) for too long. This would be almost ripping the material. I start with a 100 grit sandpaper to get rid of the graphite\charcoal staining, then use a craft knife to ...


2

In my experience, blending stumps can be cleaned fairly well by molding a kneadable eraser around the tip and twisting them inside the eraser several times. If it doesn't get most of the graphite, etc. off the first time, knead in the graphite and repeat as necessary. I've tried sanding and carving them, but I've never been satisfied with the results. The ...


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