1. The specifications of the wooden square are generally divided into 30 * 50mm. This refers to the length and width of the wooden square, which is called 35 square. This is usually used to make wooden keels for hanging sheds, or to make some sculpted internal structures. There are also 60 * 90 old furniture frames that I have seen, but they are rarely seen in home decoration. The other one is 120 * 40, which we call the doorside. It is used to make the frame of the door. Two sides are pasted with boards and sprayed with paint. One door is made. 2. Generally, the wooden square does not need to be painted in decoration. When making internal structures, sometimes fire retardant coatings will be applied as required. 3. In theory, wood can be used for modeling, but the problem is whether it is beautiful and reasonable. As long as it is beautiful and reasonable, no materials and things are unusable, which mainly depends on the skill of the designer. 4. Generally, the process of painting is to apply putty first to close the middle eye of the wood, otherwise the sprayed paint will be easy to spend, and then polish it with sandpaper. After spraying the primer, polish it again. This is about four times. This is called the so-called four coats of primer. After painting, it is also necessary to polish it with sandpaper, then spray it, polish it again, and repeat this for about three times, This is called triple finish.