On Thu, 17 May 2018 23:43:13 +0800, "Mr. Man-wai Chang"
wrote:

I think coating electronic gadgets with rubber(?) is just downright
silly, unless there is a special reason. That layer of rubber will
become sticky (resin?) sooner or later.

Filthy and eventually flaking off little pieces. That's what happens
to treating dumbbells and iron bars with synthetic material on the
handles. The alternative is callous buildups on my palms and regular
treatment with volcanic stone to remove them. I've looked at twines
and braid patterns but have yet to try them. Calluses become very
regular in their build-up, easily ripping off into a bloody crater if
not ground down.