(1) back and forth scraping method. First, the putty is coated on the edge of the plane to form lines, and the tip of the scraper is pushed outward at an angle of 30 ~ 45 degrees, and the putty is coated on the depression, and the excess putty is squeezed to the right side of the scraper mouth to form lines. When the scraper is scraped to the front end, the tip of the scraper is folded back at an angle of 30 ~ 45, and the putty is scraped to another depression, and the excess putty forms a line on the right side of the scraper. This can fill the whole surface of the object, and this method is suitable for scraping and coating the plane body.

(2) One-sided scraping method. That is, the scraper scrapes only one side, such as scraping from top to bottom, scraping from front to back or scraping from bottom to top. Scraping putty on the car body means scraping from top to bottom or from front to back.

(3) Scraping method for circular objects. The putty for circular objects can be scraped with a rubber scraper. Because rubber is elastic, rubber scraping can deform with the circular surface, putty can be scraped into a circular layer, or other scraping methods can be used, but skills should be mastered.

(4) Blow putty completely. That is, the surface of the object is completely scraped off. The surface needs to be decorated, especially. Sometimes it is necessary to combine local embedding to meet technical requirements. The putty for all-round scraping should be soft and easy to operate.

(5) local embedding. For surfaces with defects such as large holes and low requirements for surface smoothness, local batch or embedding can be used. Partially embedded putty will be harder.

Blowing putty, also known as playing putty, is a manual operation. For fine engineering, putty should be scraped flat several times, fully dried every time, and then dried or wet ground with sandpaper. The putty layer should not be too thick at a time, generally below 0.5 mm, otherwise it is difficult to dry and easy to shrink and crack. Sometimes, a small amount of primer with similar properties and colors is added to the putty for spraying to fill the pores as the second primer.

When scraping putty, hold the putty board flat in your left hand and the scraper in your right hand. There are two ways to hold the scraper: one is to hold the thumb with the index finger and middle finger, which is suitable for holding the horn scraper, rubber scraper and steel scraper; Another way is to hold a fist, which is suitable for holding a putty shovel. When scraping putty, press the scraper hard, so that the scraper is inclined at a certain angle with the surface of the object and leveled along the surface.