Core tips sand plaster machine and cement sprayer are both single machines working method, itself has advantages and disadvantages, how to Promote strengths and avoid weaknesses? then there is plastering solution birth, look difference

How many methods to effectively plaster wall?
A long time ago, people knows applying mortar on wall can be moistureproof, weatherproof, heat insulation and avoid erosion of building walls by wind, rain, snow, etc. so even no rendering machines, people still does manual plastering, except that , what else?