bent and dented aluminum spinner
#2

Think auto body repair. Where smooth faced dollies, spoons and a hammer are used to reshape dented metal. Place dolly on inside and tap tap tap to reshape. Just light taps at a time. Same technique could be used for bent areas. You will have to make the dolly or dollies. Super smooth as possible. Go slow.
For example I had an aluminum cylinder with a piston that had O’rings seals. The cylinder was dented during O’ring replacement. I used a pipe just smaller than the cylinder. Cleaned, smoothed and polished as best I could. Then with a rubber dead blow hammer I worked the dent out. May have used a regular hammer too. Can’t remember. Once done the cylinder worked again and leak free.
Good luck with your repair.
For example I had an aluminum cylinder with a piston that had O’rings seals. The cylinder was dented during O’ring replacement. I used a pipe just smaller than the cylinder. Cleaned, smoothed and polished as best I could. Then with a rubber dead blow hammer I worked the dent out. May have used a regular hammer too. Can’t remember. Once done the cylinder worked again and leak free.
Good luck with your repair.