Marsala is available in many levels of sweetness, with dolce providing the best substitute for cream sherry. Madeira, produced on the Portuguese island of the same name, is another viable substitute. In a pinch, sweet vermouth can also be used successfully in many recipes.
First they are all concrete, just different application methods. Gunite (dry nozzle)is a dry mix where water is added at the nozzle. Shotcrete (wet nozzle) is premixed wet. They both use high air pressure to force the mixture to stick to the wall. Just as if you take a ball of mud and throw it at something, if wants to stick.
What is Gunite? Gunite, also known as Dry-Process Shotcrete, is a name used to designate a mixture of 1 part Portland Cement and 4 parts sand thoroughly mixed dry, passed through a Gunite Machine, and conveyed by air through a rubber gunite hose and deposited by air pressure.