Epoxy request for information? I was wondering if anyone have any special ways of removing...

I was wondering if anyone have any special ways of removing dried epoxy on plastic,wood, or metal without unsafe it?
My sink is leak underneath the rim, right...
Answers:    i tried olive oil and it works, of late have to lighty rub it..i have mine only on a small bit though.
Tips on how to put sealant around tub?
Acetone (available at paint stores and hardware stores) may help some on metal and wood. It may dissolve plastic, so pay attention there.
How can I run hot rope from one...