Well, up until recently, I thought the same G. I thought all these issues were probably from countries where its very humid.
The only time I had a flaking issue before was on a cheap jacket that I used long long time ago to make a Tyler Durden kitbash.
Figured it was cheap knock off jacket.
All my figures are in a detolf and have always been kept in room temperature. Most of the time, once I find the right pose, that's id, I'd leave it alone.
I recently just noticed that the Crow pants are flaking.
Also, My wolverine Origins belt have flaked off. Jacket fortunately is still fine.
I'm kinda worried now Pre-ordering these 1/3 as I dont even know what to do once they flake off.