Read how to properly prepare a door for varnishing, what types of varnish exist, and also how to varnish it yourself. Today, wood has not lost its relevance in construction, interior decoration, furniture production. Therefore, a wooden door is an integral attribute of most premises, both residential and industrial. On the one hand, this is a material that is environmentally friendly, durable, and aesthetically pleasing. On the other hand, wood surfaces require special care. They are susceptible to atmospheric influences, absorb moisture from the environment, and can crack under the influence of sunlight. If we are talking about a wooden door, then in order to give it a decorative effect, to increase its wear resistance, its surface should be opened with a special varnish.
Read how to choose your front door
Varnish for a wooden door. How not to make the wrong choice
The assortment of varnishes for wood is quite rich today. In order not to be mistaken in their choice, you should know what properties each of them possesses. There are such types of varnishes for wood: acrylic, alkyd, nitro-cellulose, polyurethane.
- Particularly popular among consumers today have won acrylic paints and varnishes … They are environmentally friendly, do not have pungent odors, and can be diluted with water. But compared to other materials, they are less wear-resistant and durable. However, this disadvantage can be compensated if special hardeners are added to their composition. Prices from 300 to 1000 rubles per liter.
- Alkyd varnishes are considered to be more wear-resistant. Their main advantages are moisture resistance and decorative effect on painted surfaces. The disadvantages include a slight yellowness of the wood after coating, as well as a pungent smell of solvents with which it is diluted. In order to obtain a glossy shine, you can use a urethane-alkyd varnish. Price from 360 to 500 rubles per liter.
- If it is necessary for the varnished wood to dry quickly, use nitro-cellulose varnishes, or nitro varnishes, as they are called by the people. They are transparent, which form a shiny transparent coating on the wood, while maintaining its natural color and texture. There are also matte, after which the surface becomes slightly silky with a muted color. There are acid-curing nitrovarnishes with the addition of urea resins. They increase frost resistance, moisture resistance, and protect against sudden temperature changes. The advantages of nitro varnish include reliability, durability, as well as accelerated drying rates. Its main disadvantage is increased toxicity. Therefore, it is best to apply such substances with a spray gun. Price - 320? 600 rubles per liter.
- Polyurethane varnishes are especially resistant. They are resistant not only to weathering, but also to hydrochloric and sulfuric acid, ammonia, mechanical damage - shock, abrasion, cutting. However, such material can sometimes darken the wood, therefore it requires a mandatory primer.
Preparing the door for varnishing
The first stage of the preparatory work is the removal of the old coating, if any. In cases when it comes to paint, it is better to use a hair dryer or sandpaper. It is better not to use a paint remover, since the wood can absorb them and change its color under their influence. If we are talking about old varnish, then you can use a special remover for such materials. The surface cleaning process should be carried out as carefully as possible so as not to spoil the appearance of the door.
The next stage is surface grinding in order to eliminate all irregularities and roughness. This should be done with sandpaper with a fraction of 60 to 180 (depending on how serious the flaws need to be eliminated). If this procedure was not enough and the irregularities are still noticeable, you can use a wood putty of the appropriate color.
In the photo Drevoteks (1 liter) is a hard-to-wash preservative antiseptic for wood protection, the price of a liter is 72 rubles. Then, using a brush or roller, special substances are applied to protect the wood from fungus and bark beetle (wood preservatives). Then the door is primed. Carrying out all these procedures, it is necessary to ensure that the impregnation, varnish and primer are on the same basis (it is better if they are from the same manufacturer). After priming, sandpaper again and apply a layer of primer again.
Door varnishing
To apply varnish on the door, you need to prepare a narrow roller and a narrow brush, a special tray and sandpaper No. 400. Cover the door in a horizontal position, very quickly so that the transitions are invisible. As a rule, the procedure must be repeated three times, waiting for the previous layer to dry completely. After each application and drying, flaws on the surface must be removed with sandpaper (except for the last layer).
Before varnishing, all hinges and locks must be removed so that the entire surface is covered and, accordingly, protected from various external influences. To get an idea of what the door will look like after varnishing, you can make a few test strokes on the end side of it and wait until it dries.
Watch the video with tips on how to properly restore a wooden door, how to apply varnish:
Video about table restoration - cleaning and varnishing:
