Pop wrote:

I cleaned mine with rubbing alcohol, then dipped each end into
some oil paint; works well and soon's you use one, the paint in
the jaws slips right off. Tried tape, taped just the SAE, don't
need to do both, but the tape doesn't stay. Plus it bothered my
hands on the larger wrenches.

I tried those stick on labels with size, for sockets. Didn't stick.