The boot polish became surplus to requirements, and was similarly disposed of, when it was decided to substitute dubbin.
Existing instructions already provide that boots should be treated with dubbin and that blacking should not be used.
A very old and widely used conditioner is dubbin.
Dubbin has been used since medieval times to waterproof and soften leather boots.
Instead, they were often called "blacking" (especially when mixed with lampblack), or simply continued to be referred to as dubbin.
