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.
LFGUY1000 Niche: A gunite/plaster shield is provided to protect the niche and ring during construction. The shield is designed to be installed during the. gunite and plastering process. When finished guniting, pull on the tab and remove the outer ring of the shield. Keep the shield in place while plastering.