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There's no set time frame i'm afraid, but it may see you 6 months ok. Maybe more, maybe less. Too many variables though, so it's just when the strop's not working it's magic. If you get another strop...

That's a fantastic razor!
I'd send it off to get it honed. You'll know how they're meant to feel & will keep outlay to a minimum. If you try to do it yourself, firstly you may struggle to get it...