When using a paintbrush for painting in the restoration of ancient buildings, the following key points should be noted:
First, grassroots treatment
Thorough cleaning
Use tools such as brushes, sprayers or high-pressure water guns to thoroughly remove dust, dirt and old paint from the surface of ancient buildings.
Check the surface for cracks, holes or other damages, and repair them if necessary.
Finish the surface
Trim the burrs, forks and other defects on the surface of the wooden base layer, and polish it with sandpaper to make the edges and corners neat.
For wide, large and deep gaps, wooden strips should be embedded into the gaps and then the seams should be torn off.
Second, painting
Primer application
The selection of primer should be determined based on the material of the ancient building and the desired final effect. Generally, products that are waterproof, anti-corrosive and have good adhesion should be chosen.
The primer should be applied evenly to ensure complete coverage of the base layer and enhance the adhesion between the paint and the surface of the ancient building.
Topcoat application
Choose the appropriate paint color and texture to maintain the style of the ancient buildings.
When using a paintbrush for painting, apply force evenly to avoid missing areas or piling up.
For large areas, a combination of vertical, horizontal and diagonal brushing can be adopted to ensure even coverage of the paint surface.
Leave sufficient drying time between each coat to avoid sagging.
Multi-layer coating
Apply multiple layers of primer and topcoat as needed to enhance the protective effect of ancient buildings and extend the service life of the paint.
Before each layer is applied, make sure the previous layer is completely dry and carry out the necessary sanding treatment.
Third, painting techniques
Control the amount of paint used
Don’t dip too much paint on the brush to avoid dripping or causing uneven paint thickness.
The paint should be filtered through a fine screen before use to ensure a smooth and fine coating effect.
Keep the brush moist
During the painting process, it is necessary to frequently dip the brush in the paint to keep it moist.
Avoid continuing to apply the brush after it has dried, as this may damage the bristles and affect the application effect.
Overlapping brushing
Each time you apply, the overlapping area should be approximately one-third of the brush width to avoid brush marks.
By overlapping the application, it can be ensured that the paint surface is evenly covered without any omissions.
Fourth, Precautions
Construction environment
Ensure that the temperature, humidity and other conditions of the construction environment meet the requirements for paint application.
Avoid construction on rainy days, when the humidity is high or the temperature is too low.
Personal protection
Construction workers should wear appropriate protective equipment, such as gloves, protective glasses and masks, etc.
Avoid the irritation and harm of paint to the skin and respiratory tract.
Product quality
Select paint products and coatings that meet relevant standards and have good quality.
Avoid using inferior products to prevent affecting the painting effect and the durability of ancient buildings.
Fifth, post-maintenance
Regular maintenance
In order to maintain the good appearance and protective effect of ancient buildings, the paint surface needs to be maintained regularly.
The maintenance content includes cleaning, repairing and repainting the paint layer, etc.
Environmental control
Control the environmental conditions around ancient buildings to prevent dust, particles and other substances from entering the construction area and contaminating the paint surface.