Just because an assembly is made in America, Britain, or Japan doesn't mean it doesn't have Chinese polymers in it. Either the raw material or the finished part.
That's how the industry works these days.
Blaming China won’t work here - I know for a fact that some of these things that E-10 has eaten have been all-USA sourced.
And that doesn’t even begin to explain how US and Japanese aluminum and steel (which could not have come from China due to their age) get etched by this shit.