The blades of our ice skates are equipped with a hollow grind. From time to time, the blades should be sharpened. Especially after a long summer break, when the skates are taken out of the basement or attic, the blades are often dull or rusty. In this case, you should not attempt to sharpen them yourself with sandpaper but leave the sharpening to a professional.
This service is offered at ice rinks and larger sports specialty stores.