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Picture of Use Sugru cold set rubber to cover exposed metal threads
You can use Sugru to cover up normally sharp edges. In this case, I had an exposed metal thread at the junction between a pipe and a flange it screwed into. When Sugru sets, it becomes relatively hard and can prevent incidental scratches and cuts.

Step 1: Find something that you might cut yourself on.

Picture of Find something that you might cut yourself on.