I think it’s do-able but difficult and would require skill to get a good result. I think the flypress and blow torch (oxyacetylene if you have access) is your best bet. I managed to straighten a badly bent aluminium tube for my Whitley front turret. I was told not to bother as it would crack. Well, it didn’t and it turned out very nicely in the end. If you need access to a fly press let me know.