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and note that pumice is mostly fragile glass which
is less abrasive in the long term than the abrasive
in most sand/abrasive papers.

Pumice may have larger crystals of 'stuff' in with...

As jockeys said... Yes.

The surface is a mater of preference. Your preference!

I assume you selected the 'best' bit you could find at Tandy.

Just dry and from the store that will strop a...