Here's my test subject alluded to earlier.
The finish feels dry, but per the problems reported above, I subjected it to some much more intense handling than I would normally. For starters, I held it tightly like this for two minutes (I could feel the plastic get warmer):
Then I rubbed that area vigorously with my sweaty fingers. No effect. Next I polished the area with 5 levels of micro mesh, up to
1200 12000, where it started to achieve a slight gloss. No sign of the nasty problems reported.
Finally I applied IPA to the area - that did attack the finish, but I suspect it is because it got through to the underlying Future layer.
Once the IPA evaporated the finish, though marred, was hard again.
Observations: the finish appeared to be fully cured after 1 hour. Therefore, based on the reports above, if your finish isn't curing nearly immediately, it probably never will.
I am going to keep on using this stuff -- it really does deliver a excellent, smooth, super thin finish -- but I will be wary of it as well...