sharpening carbide bushing chisels

[Bill Brayman <meta@xxxxxxxxxxx>]

Does anyone know of a grinding wheel or other way of
sharpening carbide tipped bushing chisels? An ordinary
greenstone grinding wheel sort of works but not very
elegantly and leaves too flat an angle. Granite and other
hard rock dulls them too quickly to send back to the company
for refacing.

Thanks in advance,
Bill