If it is only a burr on your blade, I imagine you can sharpen them repeatedly. I'm buying an extra roll of foil for my sewing room. Wonder if it will work on some of my old thread nippers. worth a shot. I save my coupons from Joanns for things like rotary cutters and blades. BTW, if you have a Tuesday Morning store, check their craft area. I recently bought a new 60mm rotary for about $10.00. The replacement blades cost that much unless you have a coupon. They get in interesting sewing and crafting items. A few fat quarters. rulers, etc.