The subject line describes my question. What is your opinion? The long story: Last October my club had a professional turner in to teach a wet wood bowl turning class. Being a new turner I signed up and purchased a set of three bowl gouges. The instructor sharpened all three gouges. Last month we had an open session where people could bring in projects that they needed help with. I brought the rough turned bowls in along with my tools. I had not used the bowl gouges since the class. The person managing the session declared that all three bowl gouges were dull. How can a HSS tool go from just sharpened to dull by setting on the shelf for ten months?