In intaglio, a process for making changes In the plate by scraping the metal with a wedge-shaped tool below the level of the incised line so that the scraped area does not hold ink The surface is then smoothed and polished with a burnisher In lithography, the process of scraping away tusche or asphaltum with a razor to make a corrections or to create an image in maniere noire top
This is a method where a coarse concrete surface is coated with a thin film of epoxy resin or mineral base mortar to obtain a smooth surface Then, finish coat or paint coat can be applied