I didn't think there was much I could do but I figured it was worth asking.
Because it's an RAF, I won't be experimenting but I had thought that if I could protect it from further damage, that would be good.
My experience with alligatoring is just at the shellac level - that's what I've encountered here anyway - so I'd probably use Glenn's process on it. This is much further down. I've seen this before on the 130s but I didn't feel the need to fix it. If it was a more common decal set, I would try some of the things Glenn and Mickey2 mentioned. As it was, the cleaning got my heart rate up high enough I don't feel the need for a workout today!
I will just be happy I'm in an arid climate and hope that the rest of its temperature controlled life will be rust free.
I have wiring left to go then it's just some adjustments and a test sew. (And waiting on the new slide and throat plates I ordered) I'll post some pics of it once I'm finished.