I have heard that some modelers resharpen there cutting blades. I have use a stone to sharpen my pocket knife or other hand knives but to put a good sharp cutting edge on thees small blades such as the OLFA Art knife would be very hard as the blade is so small and would be hard to handle. Or am I missing something here? I have been throwing my dull blades away and just ordering new ones when I need them. I'd love to hear some input on this.Somehow I just know I'm screwing up again. Thanks for your input. waddy