We got some 'scratch mitts' in our initial clothing purchases, usually because they came with an outfit. For the most part, I've ignored these, and in the two weeks we've been caring for Christophe, he's really only had the one significant scratch:
Since then, we've been keeping a closer eye on his nails, filing them as necessary, and that seems to be sufficient. The cut on his brow has healed, and nothing new. So, barring any more surprises, I'm ready to declare scratch mitts a waste of time.