As a general rule, bandsaw blades are not resharpened. Ordinary bs blades would cost more to get sharpened than a new blade. Huge waste of material IMHO. But, that's the way it is. Some folks do their own sharpening. I might be able to find a tutorial on the subject if you really need it. As for your circular blades, most towns have a couple professional sharpeners. Usually these are retired guys who do it as a sideline. Ask around. If the blade in question is a high end one, like Frued, you can send to them and for lotsa $$$ they will resharpen to their specs.