I believe it’s really difficult stripping ali
I asked a chemical stripping company on a stand at the NEC classic Car show who told me they can do steel but not Aluminium
I seem to remember it’s because of the chemicals needed, too environmentally damaging or dangerous a process to do it commercially
Can’t remember exactly the reasons. I think it was because it needed a strong acid
Because it will be unlikely to do commercially, you might have to research and do it yourself but I believe the chemicals and the by products are nasty
