As background:
I was given a Meade 390 that was in pretty sad shape. The owner found it in a basement cleanout and they knew that it had sat through a few basement floods.
Mechanically it's in surprisingly good shape. The OTA had a lot of dirt that cleaned off fairly easily. Cosmetically the hardware is showing rust and corrosion, but not horrible. The tube has numerous scuffs to the paint so even without the flooding it had a rough life. I've gotten it cleaned up enough to use and it gives some nice views.
The only thing I'd like to work on some more is the front objectives still have what looks like mineral deposits or fogging on all surfaces after cleaning a few times. I've done some research and found this topic https://www.cloudyni...e-of-meade-390/ that got it looking a lot better. I also tried leaving the glass to soak in the Sun in a tray of vinegar for a few days thinking that might help dissolve the deposits still there. It helped a little but not totally clean.
At this point I'm wondering if there is anything else I can do at home to clean them better. I don't really need the scope, I've got a similar size already, but this feels like one of those projects to restore it back to as close to original condition as possible on my own. I know I could probably send them out somewhere to get stripped and recoated but I don't think I want to spend that much.
I can use it as is. The views aren't visually hampered by the slight fogging/deposits on the lens. I'm just being curious on how far I can push the cleaning envelope.
Any suggestions?
Tom