There is a pneumatic mud stamp including an applicator, a tube-like
member, a stopper, a retraction mechanism, ad a pneumatic control. The
applicator is configured to apply mud in a pattern and includes a boot
and a faceplate with a slot. The tube-like member is coupled to the
applicator and includes a first chamber configured to hold mud, a second
chamber configured to hold pressurized air, and a decoupling mechanism
configured to open the tube-like member for insertion of mud therein. The
stopper is slidably disposed within the tube-like member between the
first and second chambers. The stopper provides a fluid tight seal
therebetween. The retraction mechanism is configured to facilitate moving
the stopper away from the applicator. The pneumatic control is configured
to selectably dispose pressurized air into the second chamber.