The first step: clean up the working surface, remove protrusions, and fill in depressions;
The second step: Use putty to make paste-like paddle, stir it evenly; (Quick-drying powder can also be used instead)
The third step: wipe the paddle material on both sides of the inner corner, and keep a certain thickness;
The fourth step: Close the inner corner to the corner of the wall, find the horizontal and vertical, and scrape the oar material overflowing from the hole;
Step 5: After drying, use the top of the inner corner as the positioning side to scrape the putty;
Step 6: After drying, sand it with sandpaper, and finish the construction of paint or wallpaper.
