C
Concrete guy
Also thought about Alpha Professional Tools which looks quite effective and comes in @ 100 bucks (with delivery)
A forum member brought these to my attention this morning, asked if we did anything like them. I've had a good look at the specification.
What the Alpha products are produced from is Silicon Carbide, but compressed into a solid wheel. Historically we used to call these carborundum wheels, often used for cleaning up welds and generally cleaning metals.
These will work, but at 11,000+ rpm they are going to be a bit difficult to control and you certainly won't be able to do detail work with them.
It's also worth nothing the Alpha products have a 5/8" bore so won't fit a European machine which is 22.23mm or 7/8"