Spalted maple is wood that has started to break down. In my studio it falls into three categories: full integrity, parts that need firming up and you must be out of your mind if you think you can make something out of that.
Spalting does not break down the wood uniformly. Some areas rot faster than others. But in the end the wood totally disintegrates and becomes part of the soil.
This piece is of the second group. In order to make a functional salad bowl I had to use epoxy to bring the softer sections of the wood to the same hardness as the rest of it. For more information please visit my website and this page in particular: https://www.jimlorrimanwoodturner.com/looking-after-your-wood-turning.html