since my last posting at bottom of this page i had others contact me on my way of polishing. i’ve had to tell some to clean their tin alloy lap and with a alcohol too. then follow my method and they are now very happy polishing all stones that way, even the old timers. contact me for an questions, i’ve only been doing this for 50 yrs and now have a 13 yr old junior club member faceting and written up in the September 2019 rock and gem magazine. i teach faceting to all ages for free.