The 10 gauge blank shells are loaded with black powder, which leaves a residue that is highly attractive to moisture. Cleaning kits specially designed for the 10 gauge signal cannon are available from the Bellmore Johnson Company. In the absence of special preparations, the best cleaning solvent is hot soapy water.
The flawless blanks are scientifically kiln dried over a specific schedule, which could last as long as eight months. American Walnut Company kiln dries each individual blank with a tolerance of approximately 3%. The blanks are equalized and conditioned to prevent any internal stress.