On 06/03/2019 19:36, Tim+ wrote:
We have some Kef speakers (cast alloy construction) that had that silky
rubber coating. Needless to say this coating is a ghastly sticky mess.

Were using acetone at present but wondering if theres a better solvent to
remove this horrid stuff. Not too worried if it removes the underlying
paint as some has come off already.

Try brake fluid. It is a surprisingly good solvent for degraded tacky
rubbery plastics. Wear suitably thick impervious gloves.

--
Regards,
Martin Brown