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I'd like to see how this material behaves when formed into kitchen utensils like wooden spatulas and spoons rather than a knife. Would the density be more like metal (heavy)? Maybe it would scratch a nonstick surface like a metal utensil. But if I could have my wooden utensils in a form that wouldn't wear down or fall apart eventually from water and heat exposure, that would be great.

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No, the density of cellulose is about the same as the density of other plastics, about 1-1.5 g/cc. For kitchen use, it does have the advantage over many other plastics that it's a thermoset; like teflon or phenolic, it won't melt, and unlike phenolic, it won't outgas toxic gases at ordinary temperatures (though who knows about the side products of the lignin-removal reaction). However, it is fairly hygroscopic, so it might not hold up as well as other plastics to water exposure, and especially to heat exposure while humid.

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