The quality of painting of the car depends on how carefully the surface was prepared before applying the paint coating. Even microscopic particles of oil, silicone or technical lubricant, invisible to the eye, can cause paint to bloat, craters or peeling off the coating after a short time. That is why choosing the right one degreaser This is a critical step in the repair of the body.
There are many liquids that can dissolve fatty contaminants, but not all of them are safe for automotive plastic, rubber and paint itself. Incorrectly selected chemistry can damage the structure of materials or leave on the surface of a greasy film that cannot be washed away with water. In this article, we will discuss what tools are really effective, and which are better to abandon when working with the body.
The cleaning process requires not only the right means, but also compliance with the technology. It is important to understand the difference between removing visible dirt and deep degreasing. Antistatic properties Some formulations help prevent the re-settlement of dust, which is especially important before finishing painting in garage conditions.
Why you can not ignore the stage of degreasing
Many beginners in body repair mistakenly believe that it is enough to simply wash the car with water and shampoo before painting. This is a gross mistake, as water is not able to dissolve oil films, which are often left after polishing, waxing or simply touching with your hands. adhesion (clutch) paint to the surface in such places will be broken, which will lead to marriage.
In addition, on the body of the car there are always traces of bitumen splashes, tar and industrial soot. Conventional solvents can spread these contaminants over a large area, making the situation worse. Specialized products are designed to emulsify fats and lift them from the surface, allowing them to be easily removed with a napkin.
⚠️ Attention: Applying paint to a poorly fat-free surface is guaranteed to lead to the appearance of “craters” (fish eyes) and detachment of enamel during operation of the car.
Using inappropriate aggressive liquids can lead to clouding of the plastic or corroding of the lower layers of the varnish. Therefore, it is important to choose compositions that evaporate completely and leave no traces. The right approach guarantees the durability of the repair and excellent appearance.
Home Health and Chemicals: Is It Worth Risk?
In search of savings, many motorists turn to the means that can be found in any hardware store or even in the kitchen. However, their use on the car body is associated with certain risks, which you need to know in advance.
The most popular “grandfather” method is the use of acetone or a polish removal fluid. This is a powerful solvent that really does a great job with fats. But it has a significant disadvantage: high volatility and aggressiveness. Acetone can dissolve not only fat, but also the paint or plastic itself, if you hold it on the surface.
Gasoline and kerosene are also sometimes referred to as alternatives. However, these oil products often contain impurities of oils, which, evaporate, themselves form a fatty film. Unleaded petrol Kalosha is considered cleaner, but the risk of leaving traces remains high.
- 🧪 Acetone is effective, but can damage plastic and paint if handled carelessly.
- 🛢️ Gasoline - leaves an oily coating, requires thorough washing, is fire dangerous.
- 🧼 Alcohol (isopropyl) is safe for most surfaces, but it can cope with heavy fats less.
- 💧 White Spirit is less aggressive, but it dries for a long time and can leave a smell.
The use of household chemicals, such as window or glass washing products, is also undesirable. They often contain surfactants (surface-active substances) and perfumes that form a film that prevents the normal adhesion of the paint. It is better not to experiment with budget options if the result should be of high quality.
Professional Automotive Degreasing Products
Specialized products developed for the automotive industry are devoid of the disadvantages of household chemicals. They are created taking into account compatibility with automotive enamels, varnishes, plastic and rubber seals. Such formulations are divided into two main categories: organic solvent-based and water-based.
Organic degreasing agents (often based on alcohols or light solvents) evaporate quickly and do not require washing off with water. They are perfect for final preparation before painting. Anti-silicone The properties of such means ensure that there will be no traces on the surface that affect the spread of paint.
Water-based products are more environmentally friendly and safe to breathe, but require mandatory drying of the surface with compressed air or thorough wiping, as the water itself can cause corrosion or paint problems. They are often used for primary washing before finer processing.
⚠️ Warning: When working with professional chemistry, be sure to use a respirator and gloves, as solvent vapors are toxic and can cause skin irritation.
Brand products are popular Brunox, APP W900, Mobihel. They provide a stable result and predictable drying behavior. The cost of such funds is higher than that of acetone, but the volume of one bottle is enough to process the entire body, and the confidence in the result is worth it.
Comparative table of degreasing products
To simplify the choice, it is worth comparing the main characteristics of popular tools. Different tasks require different approaches: one thing will suit for bitumen removal, and for the final varnishing, it is completely different.
The table below contains key parameters that will help determine the choice. Pay attention to the evaporation rate and safety for various materials.
| Remedy. | Effectiveness against fat | Safety for plastics | Drying speed |
|---|---|---|---|
| acetone | Tall. | Low (may melt) | Very high. |
| White Spirit | Medium | Medium | Low (long drying) |
| Antisilicone (spray) | Tall. | Tall. | Medium |
| Isopropyl alcohol | Medium | Tall. | Tall. |
| Kalosha petrol | Tall. | Medium | Tall. |
As can be seen from the comparison, specialized antisilicones benefit from a combination of safety and effectiveness factors. They are designed to prepare the surface for paintwithout compromising the integrity of the materials.
Always check the degrease response on an unobtrusive patch of plastic or paint before treating the entire surface. Some plastics (such as polystyrene) are sensitive even to soft solvents.
Technology of proper degreasing of the body
The cleaning process itself also has its nuances. Just wipe a cloth soaked in solvent is not enough - you will only smear the dirt over a larger area. It is necessary to use the right equipment and consumables.
For work, lilaless wipes made of microfiber or a special rag that does not leave villi are best suited. Conventional fabric rags can contaminate the surface with a micro-tail, which will manifest itself under a layer of paint. Movements should be progressive, without strong pressure.
☑️ Degreasing algorithm
It is important to work in a well-ventilated room, as the concentration of solvent vapor can be dangerous. You should also avoid working in direct sunlight or on a hot body - the tool will evaporate too quickly, not having time to dissolve the contamination, and can leave divorces.
⚠️ After degreasing, it is strictly forbidden to touch the surface with your hands even with gloves, since there is always natural fatty secretion on the skin.
If you find persistent contamination on the surface (bitumen, glue), it is better to remove them mechanically or special bitumen cleaners before the stage of general degreasing. This will allow the main tool to work more efficiently and not be wasted on a thick layer of dirt.
What to do if the surface is already contaminated with hands?
If you accidentally touch a fat-free surface with your finger, don’t panic. Take a clean lilaless napkin, plentifully moisten it with a degreaser and gently wipe the contaminated area again. Let me dry. Re-treatment is mandatory, otherwise the paint may not lie down at this place.
Frequent mistakes in preparation for painting
Even using the right tool, you can make mistakes that will reduce all efforts to nothing. One of the most common is the use of the same napkin for a large amount of work. Once the tissue has absorbed the fat, it begins to give it back to the surface.
Another mistake is not enough exposure time. Some masters immediately after wiping begin to paint, not allowing the solvent to completely evaporate. The remaining pairs can create microbubbles in the paint. The optimal drying time for most professional degreasing products is 2 to 5 minutes at room temperature.
Also, do not ignore the temperature regime. If the garage is too cold, the evaporation process will slow down and moisture from the air can condense on the surface. In a too hot room, the solvent will evaporate instantly, not having time to do its job.
- 🚫 Using dirty rags that add new contaminants.
- 🚫 Plenty of watering the body with solvent instead of rubbing (risk of getting into the cracks).
- 🚫 Ignoring ventilation, which leads to inhalation of vapors and fire danger.
- 🚫 Trying to save money by diluting the special equipment with other liquids.
Compliance with technology is the key to success. Do not rush into the preparation stage, as the correction of paint defects is always more expensive and takes more time than high-quality pre-treatment.
The main secret of perfect painting is not expensive paint, but a flawlessly prepared and fat-free surface. 90% of success lies in preparation.
FAQ: Frequently Asked Questions
Can I use vodka instead of alcohol for degreasing?
The use of vodka is not recommended. It contains about 60% water, which will leave moisture on the surface, contributing to corrosion and poor adhesion of paint. In addition, vodka can be impurities of oils and additives that form a film. It is better to use technical isopropyl alcohol.
Should I wash the degrease off with water after use?
Professional car degreases (antisilicones) do not require washing off with water. They are designed to completely evaporate. Water flushing can reintroduce contaminants (return contaminants) or leave mineral traces if the water is hard. It is enough to let the surface dry.
How to degrease the plastic before painting, so as not to damage?
For plastic, special degreasings marked “Plastic Safe” or “for plastic” are best suited. Aggressive solvents like acetone or 646th solvent can make the plastic brittle or dissolve it. Isopropyl alcohol is also a safe option for most automotive plastics.
How often should I change my napkin when degreasing?
The napkin should be changed or turned over to the clean side very often, literally after each pass on the area of 0.5-1 square meter. If you see that the cloth is gray or dirty, it no longer cleans, but smears. You can not save on rags when painting.
Is a degreasing agent dangerous for rubber seals?
Most aggressive solvents dry the rubber, making it breakable and causing cracks. Therefore, before starting work, it is recommended to glue rubber seals with paint tape or use special compositions that are safe for rubber. After painting the rubber, it is useful to treat with silicone lubricant.