I've worked on developing the list of all CG onboard the IRO class; there are many line items where they are Controlled goods - ITAR. Some of them are original to build (ie pre trump). You'd be surprised how pervasive it is. A lot of it for us we don't notice because of the Canadian exclusions.
EU stuff comes with it's own restrictions as well; it's not necessarily any better then US origin. ITAR is less onerous then people think once you understand the system, but it is painful to try and have something that obviously shouldn't have been cataloged as ITAR (like common fasterners) changed.
The plus side is US defence contractors noticed a big hit, as people try and avoid it. It's been working through the US DoS for a couple of years, but they are limiting it back to a more sane level of just the equipment specific to weapons, ammunition, etc.
The other wrinkle for becoming a museum is the PCB regulations changed a few years ago, so we aren't allowed to transfer anything with PCBs outside of their cables and control cabinets. So remediation would be required, although not to the same extent as for an artificial reef or a target. It gets pretty complicated pretty quickly.
