There were reports a few years ago of salts left from the Nitride process affected the surface appearance. Im not sure if this is the issue with this proof barrel but for the price Id check with the vendor or Proof.
It seems like the issue was the barrels werent cleaned properly after the Nitride process to remove the salts from the hot salt bath Nitride process. Whether this just affected just this particular barrel extension or the whole barrel Id want some conversation with someone in the know.
It seems like the issue was the barrels werent cleaned properly after the Nitride process to remove the salts from the hot salt bath Nitride process. Whether this just affected just this particular barrel extension or the whole barrel Id want some conversation with someone in the know.

