Crosman Mark I .22

Ok, this was quick - someone else's thread got me thinking. On this Mark I, should I coat the O-rings in anything? And also, there is a brass piston, should I coat it with any lubricant? Anything else that I should do while putting it back together? Or maybe as important - anything I shouldn't do?
I always lube o-rings with silicone grease to enable them to slide in easily with less chance of damaging them.
A thin coat of the same silicone grease will prevent oxidation on the surface of other metal parts.
This is an odd category to post your question in, I think it would be seen by more people if it were posted in the General section.
 
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