Anybody use a shrinking hammer or heat and ice to pull some stretched metal back.

Have a fender that took a pretty good hit and have it looking pretty good but still have some high spots/stretched metal.

Is the $40 shrinking hammer worth the money.
Has anybody used heat and water/ice?

Anybody try these methods and what was the outcome
Thanks Clair.


Edit I use to just mud it in but would too really try for the best panel this time