How to repair broke bolts in aluminum

O.K. tooljunkie and JDPdart were close I used a mixture of acids that attack carbon, I used a eye dropper and clay to build a dam around it. It took the EZout out in no time but the bolt was low carbon so it took longer but time was on my side so no big deal. Acid wont hurt aluminum but I have heard that it can mark it so I wouldn't just through it in a bucket if it's something that looks nice plus I used caustic soda to neutralize it when I was done. Also nitric acid is very hazardous to you and you need to be very careful with it.

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