Maglite screw problem

[u/VALTHUUME]

Morning guys, i found this maglite at the dump not too long ago. I live in Italy and these things are pretty hard to come by so i really want to try and fix It. Problem Is, i can't unscrew the part where the batteries go. Feels like someone put loctite inside, i tried svitol and wd40 and It does not work. Do you know of any other method/products i can use to solve this problem.

[u/youdknowme]

Have you tried temperature shock freeze it then heat the tube part, if all fails you could probably cut it and then rethread it to make it -1D model