The show was originally written to have Ralph and Alice move a special basement apartment for the janitor once he takes the janitor job. It would have a climax where Ralph accidentally has a load of coal dumped into their living room. It ended up being written out because of Gleason's reluctance to do much away from that apartment set.
"Martin Paints" written on Ralph's hat is a reference to an actual business selling paints and other home improvement/renovation materials on Myrtle Ave. in Queens, NYC, NY. They were in business well into the 1990s.