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you have the one with vinyl type fabrick side?
it wont last werry long but if you use that on both sides it will work somwhat ok
leather part is probably too hard and wrinkly to be any use.
But...

You said you ordred the B & B strop already?
If you didnt then dont consider it as its almost nothing good about it, and the brand should generally be avoided

Now that you have bought it (and...