I saw a Cole & Mason Derwent Salt Mill on sale, but I mainly use kosher salt so I don't really need a salt mill. But, I could always upgrade to a better pepper mill.
Are a salt mill and pepper mill interchangeable? I'm looking at the pictures of the Cole & Mason Derwent set of pepper and salt mills, and they identical to me like they're the same except one mill has salt in it and the other mill has pepper in it.
If I bought this salt mill, would there be any issues if I used it to grind pepper instead of salt?