I had a good friend who worked at the Goodyear Belt and Hose plant here in Lincoln back in the 80's and 90's. He would take a bin full of thousands of identical formed hoses made there in the plant, put a stencil in this machine that would then paint a Part Number and a logo/emblem on the hose he inserted into the machine and then tossed the freshly marked hose into another bin. After reaching the quota of say GM 12345-6789 molded upper radiator hose, he would remove that stencil, clean the machine and then insert a different stencil and taking out of the same bin of hoses as the GM batch, begin marking Goodyear (Wingfoot emblem) 789012e upper radiator hoses. When done with those, change stencils and begin marking the hoses as the Advanced Auto Premium UH-246631 upper radiator hose. Then those same hoses were marked with a NAPA Gold P/N.