restore

Hi i got a pair of NOS straight jacket 2 that has sticky rubbers mostly on the ear stock any way to deal with them without replacing them wanna keep them NOS thx:help:

The first gen plasma/titanium coatings are unique but unfortunately are prone to tarnish/yellowing, black stain corrosion, and eventually getting rubbed off into a polished/sheen patches. My previous approach of restoring these frames had addressed the yellowing and about 90% removal of black...