Scary article in this month's Fine Woodworking magazine regarding potassium dichromate. I remember Lou DiLeone proudly showing me a bass he had just dosed with the stuff. I hope all my bass repairman friends are taking proper care. I did a little looking around myself. It's great stuff for making new wood age quickly, but apparently it is does require proper measures for safety beyond just the mask.
Potassium dichromate - Wikipedia
Potassium dichromate - Wikipedia