Originally Posted by
cbrick
Swamprat, interesting. I've never used aluminum cup cake pans but the only SWAG I can come up with sounds like the aluminum was too thin and when the hot alloy filled the cup it stretched with the heat. When the alloy cooled off and shrank (lead shrinks when cooled) the aluminum just shrank with it so the ingot didn't come loose. This is just a SWAG for lack of thinking of anything else. You might try freezing them, that might shrink'em enough to get'em out.
Let us know the outcome, there are probably several folks that have had similair experiences.
Rick