How long does it usually take to learn machine tool scraping?

Generally speaking, it takes three months to learn machine tool scraping. If you find a painter to help you as a coolie and apprentice, you can work independently in three months. Painters and bricklayers now earn very high salaries, but bricklayers are more difficult to learn than painting. At present, there are not many requirements for decorating wood lacquer, just need the wall surface and learn to scrape white. So it takes three months to learn machine tool scraping.