Brushes are also used for the base treatment of high-end wooden staircase handrails.
High grade wooden staircase handrails often require paint backing, nitrocellulose wood varnish or polyurethane varnish for polishing and decoration. Therefore, when dealing with their appearance, it is necessary to first use a 100 grit sandcloth to roll the flat wood board and repeatedly polish it along the wood grain until it is smooth and even. Then, use a 120 grit sandcloth to roll the wood board and vigorously polish it along the wood grain until the surface reaches a very smooth and even finish. For the edges and curved areas, it is even more important to carefully press and polish the noisy cloth repeatedly until it feels unstoppable. When encountering exposed nail covers with hanging hands, a steel gun can be hammered into the wood to a depth of 0.2-0.3mm. However, the cover cannot be directly hit with an iron hammer to prevent leaving hammer marks that may affect the appearance of the coating. After all the homework is polished and qualified, first use a brush to clean the floating particles, and then repeatedly wipe them with a damp cloth.