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Message: <blockquote data-quote="John S." data-source="post: 1367145" data-attributes="member: 25781">We are talking about $5.00 synthetic rubber parts that come sealed in their own little bag or box.  Based on my experience in trading collectible cameras and binoculars I see no reason to coat those parts and then store them. I've purchased synthetic rubber components new in the box from the 1960's that when flexed showed no cracking.  That's after 40 years in a cardboard box on some dealers shelf!On the other hand it might make sense to periodically coat pieces that are in use and exposed to sweat, skin oil, sun, salt air, etc.</blockquote>