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I have been buying “stuff” for some time now I learned “It’s not meant for what they don’t say”… in other words if they explicitly say “wet/dry” then it’s wet or dry use, but if they don’t say...

The only issue I see is, we usually recommend wet/dry sandpaper paper, but the first link says"...a great choice for effective dry preparation of metal surfaces."
When they say "dry"... usually...