Do I need to worry about a bluing solution pitting (i.e. cratering) the metal?
If used according to our instructions and not modified in any way, there is no need to be concerned about pitting of metal when bluing a firearm with our products. Generally speaking, ambient air and water won’t cause pitting overnight. However, some small ‘cratering’ may develop after a month or more because of natural oxidation if metal is exposed/left unprotected to the elements.