I'm way behind on detailing/restoring several purchases so I find myself hopping back and forth doing a bit here and there on them.
The other night while shuffling some boxes I ended up doing several hours of unplanned work on one of my Bushnell Sky Chiefs.
These early Sky Chiefs take much longer to clean up than what would be expected because of a particular problem unique to them. Their boxes originally had some kind of foam rubber padding in a few spots that disintegrates into fine particles and basically glues itself to everything it comes in contact with. I've yet to find one good cleaner or solvent that will safely get it off the various different materials/finishes of the scope. Prior to this session, the objective of the scope in the box (photo below), was bathed in a solution of 1 part distilled water to 1 part Windex for an hour or so to successfully softened it up. Curiously Windex wouldn't work on the painted parts. I'm guessing the foam debris chemically bonds to the paint. For the painted stuff I tried mineral spirits, alcohol, Windex, Simple Green, Awesome, followed by polishing compound followed by Turtle Wax. The mineral spirits was the best of the cleaners, but it took polishing compound and wax too get most of it off.
Warning: Be especially careful when using alcohol as a cleaner as it sometimes will dull or take off certain kinds of paint. I remember reading how another member used it on a focuser's badge and it ruined it.
I wondered what would be lurking under the finder's base? Now I'm wondering what number will be on the other scope.
BTW, you can't see it here, but there's still some sand packed up in the base left from the original sand casting. I noticed the same thing with my old Tasco.
At this point, the foreground tube, finder and mount, is all cleaned up. The scope in the background has been cleaned some but still needs better detailing.
It took over an hour of soaking in mineral spirits, then scrubbing with lacquer thinner and acetone, to get the hardware clean.
There's a lot to do and cover on these two scopes so I may start a dedicated thread.
Edited by Kasmos, 13 October 2018 - 02:34 AM.