Actually that makes sense. When working with epoxies what I use to
clean my hands is vinegar - it cuts uncured epoxy easily. And it's
only a little bit smelly ... ;-) What I do is to put some on my hands
and 'wash' it off with a throw away rag of some sort. This is normally
only necessary when you have gotten far more epoxy on your hands
that normal and I don't remember ever having to do this when
working with epoxy on a model.
I have not tried vinegar on cured epoxy. But your experience
with alcohol sounds like cured epoxy bonds -can- be attacked" ...
if you are willing to wait.
I suspect that what actually happened was that the alcohol
'dissolved' (broke the bonds) the epoxy 'one layer at a time'
until the weight let go. I assume you also had to clean up and
repaint the car after those long months soaking in alcohol.
- Jim B.