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Hi there. I'm new to the forums and pretty new to Mooneys. We bought our first plane this past April, a 1981 M20K, and have put about 25 hours on it so far. It just went down for annual in July as well as an avionics panel upgrade. After we opened it up and took off some interior siding we found that a family of mice had moved in and proceeded to eat up much of the insulation and spread their business about the steel tubing in the cage and a bit into the left wing. We figure they came up the left main gear sometime between its last annual and this one. Couldn't smell a thing!!! Corrosion is an issue and some tubes are going to need to be replaced and specialty welded back in. Insurance has been great and is going to cover repairs. The poor bird is scheduled for some NDT early next week. One of the options being presented to insurance, which to my surprise they seem to be on board with, is to have the whole "birdcage" removed after being de-skinned, repaired, sand blasted and then powder coated. Modern insulation and likely some new paint, or a betterment towards new paint, better wiring and some other addons to follow since this is all going on. I'm looking for some expertise and opinion on the powder coating idea vs the standard treatment of green. My concern is that it's a 35 year old airframe and even with a proper prep and coating that should some other crack/corrosion arise in the future it wouldn't be able to be detected anymore. I've noticed its common for engine mounts to receive this treatment these days regardless of the higher stresses they endure. I look forward to your replies.