Hello
My F-512 was put in airplane cold department few times - on a 6-8 hour flight it is guaranteed to get throughout cold. It has been transported around Finland both summer and winter in any kind weather. Always in it´s original case with no extra protection. After all these years the top finish looks like this:
As you can see - some checking. Dings - scratches - dirt - filth - etc - you name it . . . Sun went away some hours ago - if needed, I could take another picture in bright daylight.
There is absolutely no way to remember, when those few checking lines appeared.
And yes - I have seen finish checking/cracking when it happened. Told this before. In MN deep, cold winter month - a customer brings his Les Paul into our store and opens the case. After short while we can hear it go cracking. Entire finish went into "cobweb". Turned out he had it in his trunk for three days before he brought it in. Poor fella. He lost about 400USD right there.