The old time millstone dressers had only his beard, gloves, long sleeves and hat for protection. After the millstones are dressed and reassembled they must be purged of stone chips. A vacuum cleaner and brush won't do a complete job. You purge the millstones with 75 to 100 lbs. of grain and throw it away. In this case, it is in the quality of the flour ground by the millstones.
Today there are very few places that make millstone dressing tools.
The old tools were often kept near the millstones on a beam which formed a shelf for them. Sometimes they were hung in leather loops on the millstone crane. In one of the last mills I visited with Charlie Howell, we saw a paint staff, near where the mill once had its millstones. Many years ago they were removed. The mill had been converted to grind only animal feed.