> Bob, avoid sand completely, if you need media that cuts that deep and that
> hard then use "black beauty", 150 lbs for $8.00 and not as harmful health
> wise. I only use black beauty on very rusty exhaust manifolds or
> rusty rims,
> it cuts so much it can be leave a surface that will show through
> and paint,
Fred, out of curiosity, what grade of Black Beauty do you use ?
BTW, "Black Beauty" is a brand name for crushed coal slag aka boiler slag.
It's also available under other brand names, like Black Diamond and Black