How to choose a clear varnish for metal?

Metal symbolizes strength and durability, but at the same time it is easily exposed to impacts that spoil its appearance. It reacts easily with air, water, humidity and chemical solutions. To date, there are many different ways to get rid of damage to the metal surface, but it is better to use means to prevent their appearance. To do this, just cover the surface with a special varnish. The lacquer envelops the metal with a transparent protective layer, and can also give it a light shade.

To choose the most suitable varnish for metal, it is necessary to study in detail the composition and effect of each type. Consider a brief description of some of them.

As the name suggests, it contains bitumen and polymer resins.After drying, the product gives the coating a black tint similar to tint. They can cover not only metal, but also wooden and stone surfaces. The product is heat resistant, durable and safe for human health. At the moment, it is very popular in the market, because in addition to all the listed advantages, it also differs by its low price.

It consists of polymers that, when applied, create a strong adhesion to the surface. It has anti-corrosion properties, therefore it is used for processing metal products, and most often for metal utensils. This varnish can be invisible (colorless), glossy and even matte. The coating can have a different shade, can be used as a protective layer before applying paint on the metal.

It forms a very resistant film, well tolerating constant humidity and temperature drops. Varnish is available in the form of aerosols and ordinary liquid, which is applied with a brush. In the modern world, it is most often used for surface treatment of car parts.The product easily tolerates the effects of chemicals and may even extend the life of various metals.

Unlike previous types, after drying, it gives the metal surface a glossy shine. Means in the form of spray and in the liquid state is on sale.

Due to its special thermal stability, this type is applied only to brickwork and furnaces.

As a rule, the surface of the metal is polished before applying the varnish. This is done with a special apparatus, and then with an emery paper, since scratches remain on the surface after hard grinding and sandpaper helps to smooth them. After the surface becomes glossy matt, we can assume that the grinding is finished.

Lacquer coating will go better if applied in an aerosol way. Using this method, you can avoid divorce. It should be noted that in multilayer application, you need to wait for the complete drying of the previous layer.

During long-term storage, the lacquer may harden or decompose into components. If in the latter case the usual shaking of the jar or the mixing of the composition helps, then the first situation may cause difficulties at the beginning of work. However, this problem can be dealt with - if it is a spray, it can be heated in a water bath, constantly raising the temperature. After a few minutes, the solution will become uniform and liquid.

Before you finally decide on the choice of varnish, you need to consider that such tools can protect the surface before painting, and can also perform a decorative function. Each of the described types is resistant to temperature and humidity, and some even to varying degrees protect against mechanical damage. It should be selected based on the type of metal and subsequent operating conditions.

How the varnishing of the polished disc occurs, see the next video.