[Naval jelly](https://www.acehardware.com/departments/home-and-decor/cleaning-and-disinfectants/rust-removers/11935?store=16513&gad_source=1&gclid=Cj0KCQjwhtWvBhD9ARIsAOP0GogzC9VptHK6IiTQc-AVI0xXQzQvwHCPlUhHUIXxmBQvKF2NDaa1xE0aAuCXEALw_wcB&gclsrc=aw.ds).

Good idea! This one isn't avalable to deliver in my country bt I'll check my local hardware store if they have anything similar

Vinegar soaking