Old Glue on an old MPC Model from 1981

I would remove the windows and replace with thin clear plastic such as the kind used in packaging or acetate.

Progressively finer grades of sandpaper then a coat of Future to hide the fine scratches.

when you have all of the old glue removed, you should be able to polish the clear parts up completly by using a ladies finger-nail polishing stick. they usually have three grades of sander on one stick, fhe finest of these is so fine it feel a bit like rubber rather than a sander.

I think that they are called 'Nail Glossing sticks', here in the UK at least.

Karl

Welcome to the forum

I doubt very seriously that the problem is caused by CA fogging, rather a very young modeler who managed to spread the styrene glue while assembling the model. If you can get the parts off the model (old glue, especially tube glues tend to get brittle with age) - so gentle prying may pop the part out without damaging anything.(no guarantees though). Once out, I would try to sand out the damage, starting with 400 wet/dry sand paper. As the damage is removed, I would work through finer grades of sandpaper until the damage is completly remove and the area is now polished.