An aluminium saucepan was dropped on the kitchen floor and now the lid will
not fit on, due to a fairly small flattening of one side.

The saucepan is 16cm in diameter and the aluminium is 3 mm thick. My thumbs
are just not strong enought to push the side out enough for the lid to fit
on.

Cannot think of a way to get a good leverage on it to re-shape it, without
damaging the non stick coating on the inside of the saucepan. Grateful for
any suggestion. Thanks.