No, not looking through a rusted eyepiece...
 
I picked up a Lyman STS scope at the Sioux Falls show and like much of the plunder I gravitate towards, it was missing the lock ring on the front objective.  Made one, not an issue.  I grabbed the eyepiece to try moving it and try as we might, it wouldn't budge.  I know any kind of penetrant on a scope is taboo and I tried a little dab of heat with a heat gun, some leather wraps, rubberized lid grips, two of us cranking on it, nothing would move...  holding a scope because of the tube size (wall thickness) is a challenge without the gremlins making something fail. 
 
A remedy that worked -  I had some left over acetal from a past job that got my attention.  I squared up a couple surfaces on each scrap, drilled a hole through to fit my diameters and drilled a couple of holes for clamp screws through the piece that served as the wrench.  Even with a snug fit to the tube and the eyepiece nothing moved.  I looked around for my can of rosin but in time of need I couldn't locate it.  I remembered some discussion once about powdered sugar for that use.  There was a box of week old donuts in the trash and it just so happened one donut with powdered sugar remained.  Just a dab of white, re-tighten the wrench and the block in the vise and what do you know, everything moved!  There was quite a bit of rust in the threads.
The scope got shipped off to Cheryl this morning for a cleaning and reticle change - everything's good.
GT

Nice work GT! Thanks for sharing... That powdered sugar trick is something I will have to try sometime!
Jeff P

GT, for those that may need similar type scope care, could you please expound on who Cheryl is and how to contact her. Thanks

Thank you GT, 
WOW, am gland I asked the question as I live approximately 15 mile away!! I live in the “Texas part of New Mexico” LOL. I have several old Stevens and original Malcolm scopes that need work on. Will be calling her later this afternoon.
Thanks again 

Shucks