I got an Orion 90mm burgundy Starblast refractor with AZ-3 mount & tripod for $36 on GW 4 weeks ago. Thought the price was decent. Being retired , my scope budget is meager. Every exposed thread & bolt & screwhead were covered with rust.This scope must have been on a porch or in a barn & exposed to a lot of weather. Took 2 weeks with a wire brush & solvent to get the mount usable. The OBJ lens was completely fogged. Another week to remove the OBJ lens & separate the lenses & clean with vinegar , toothpaste & alcohol. Got it completely clear. I probably put more effort into this scope than it is worth. Now it provides me nice clear views & I am happy. A really nice Meade diagonal & meade 8-24 zoom EP helped a lot. Disassembled everything & lubed all too. Thanks piaget
Edited by Piaget, 12 January 2021 - 12:59 AM.