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If you accidently rolled the edge by using too much stropping pressure, then the razor will have to be rehoned. If you have some green CrO, then you might be able to recover the edge if it has not...

And a third vote for being careful about the amount of pressure.
I was a Mach 3 shaver that went to a str8 too. Started out just shaving the cheeks to get the feel of the str8. Did a WTG and two...