Protective coating Raptor from the company U-POL has become a real revolutionary solution for owners of SUVs, pickups and commercial vehicles. This is not just paint, but a durable polyurethane composition that creates a rough texture on the body, reminiscent of shagreen. The main advantage of the material is its ability to hide minor surface defects and protect the metal from impacts from gravel, branches and corrosion. Painting a car with this material yourself is a real task even for a beginner, if you strictly follow the preparation technology.
Many car enthusiasts choose this particular method of protection, as it allows them to save significant money compared to the services of professional detailing centers. However, savings should not come at the expense of the quality of training, because adhesion (adhesion) of the material to the surface depends precisely on the preliminary work. Unlike classic enamel, "Raptor" forgives minor flaws, but is critical to degreasing and priming. If you plan on getting a durable coating that will last for years, you need to carefully consider each step of the process.
Working with polyurethane compounds requires certain skills in working with a spray gun or a special gun. It is important to understand that the material dries very quickly and has a specific viscosity. Incorrect dilution or temperature violation can lead to the appearance of shagreen of the wrong size or even peeling of the coating over time. In this article, we will take a closer look at how to properly prepare the body, mix the components and apply the finishing coat so that the result looks professional.
Selection of materials and calculation of required volume
The first step to successful painting is choosing the right equipment. Standard set Raptor usually sold as a four-liter kit containing four bottles of base and one liter of hardener. This volume is usually enough to process one medium-sized car (for example, Toyota Land Cruiser or UAZ Patriot) in one layer with a small margin. If you plan to apply two coats or cover large areas such as the bottom and arches, you will have to double the amount of material.
The key point is the choice of color. The base is most often sold in white, which allows you to tint it in any shade from the catalog RAL. However, for independent work in a garage, it is easier and more reliable to use a ready-made black or gray composition, since matching the body color during tinting requires professional equipment. You will also need a special thinner, which regulates the viscosity and size of shagreen. The use of unsuitable solvents (for example, 646) is strictly prohibited, as this destroys the chemical structure of the polyurethane.
In addition to the coating itself, stock up on consumables. You will need adhesive primer for plastic if you are painting bumpers, and acidic or epoxy primer for metal elements. Don't forget about masking tape, covering film and sandpaper of different grits. Quality materials are the foundation of durability. Cheap analogues may bubble in the sun or crack during the first pressure wash.
Buy material with a margin of 10-15%. During the work process, part of the composition will inevitably remain at the bottom of the cans, on the walls of the spray gun, or will be used for test paints. The same shade may differ from one manufacturer to another, so it is better to take one large set than to buy more later.
Necessary tools and workplace preparation
For application Raptor It is not necessary to have a professional spray booth, but a clean, dry and well-ventilated area is necessary. Dust is the main enemy of any paintwork. If you are working in a garage, be sure to do a wet cleaning a couple of hours before starting work to allow the dust to settle. The room temperature should not be lower than +20°C, since at low temperatures the material becomes too viscous and does not spread well, forming excessively large shagreen.
As for the tool, there are two ways. The first is the use of a special pistol Raptor, which comes included or is purchased separately. It is connected to a compressor and creates a characteristic large texture. The second option is to use a standard spray gun with a nozzle of 2.5–3.0 mm. The second method produces a finer shagreen grain, close to the factory texture of some SUVs, but requires more careful pressure adjustment. The pressure at the inlet to the gun is usually 3-4 atmospheres, but it is better to look at the exact values in the technical documentation for your tool.
Don't forget about personal protective equipment. Solvent vapors and polyurethane microparticles are harmful to the respiratory tract. Working without a respirator with a carbon filter is unacceptable. You will also need nitrile gloves and safety glasses, as the material is very difficult to wash off the skin and can cause irritation.
☑️ Preparing tools and space
Technology for preparing the body for application
Surface preparation is 80% of the success of the entire operation. If you skip this step, no expensive coating will stay on the body. First, the car must be thoroughly washed, removing all dirt, bitumen and road reagents. After washing, the surface is degreased with a special anti-silicone. It is important to wipe the body with two napkins: apply degreaser with one, and immediately wipe the second one dry so as not to smear grease over the surface.
Next comes the matting stage. Glossy surfaces (old paint, varnish) must be treated with abrasive. For metal and old paint, use P80-P120 grit sandpaper. Your task is not to remove the paint down to the metal, but to create risks on which the primer and coating will catch. If there are pockets of corrosion on the body, they need to be cleaned to bare metal, treated with a rust converter and primed. Smooth but damaged areas (dents) are puttied, sanded and also covered with primer.
⚠️ Attention: Do not apply Raptor onto a smooth, glossy varnish without preliminary matting. Polyurethane will not be able to adhere to a smooth surface and will begin to peel off in layers over time, especially when washed with a Karcher or mechanical stress.
After sanding, the body is thoroughly degreased again. All elements that cannot be painted (glasses, headlights, handles, moldings) are sealed with masking tape and covered with film. Pay special attention to the panel joints and seals - material should not get there. It is also recommended to remove door handles and mirrors, if the design of the car allows this, in order to avoid unpainted areas in hard-to-reach places.
Do the doors need to be removed?
It is not necessary to completely remove the doors, but it is highly advisable to remove the handles, locks and plastic trims. If the doors remain on the car, they need to be secured in the open position with spacers in order to properly paint the ends and avoid sticking to the body during drying.
Preparation of the working mixture and setting up equipment
The process of mixing components requires precision. The contents of the bottle with hardener are poured into a four-liter jar with a base (base). After this, the mixture must be shaken thoroughly. Then the thinner is added. The standard proportion for obtaining classic shagreen is 30% of the thinner from the volume of the finished mixture (base + hardener). If you want a finer texture, the amount of thinner can be increased to 50%, but not more, otherwise the strength of the coating will suffer.
After adding all the components, the mixture must be stirred intensively for 2-3 minutes. It is important to lift all the pigments from the bottom and distribute the hardener evenly. The pot life of the finished mixture is about 2-3 hours at a temperature of +20°C, so you should not mix the entire volume at once if you are working alone and slowly. It is better to prepare one portion for one side of the body.
Setting up the spray gun is a critical moment. The nozzle must be wide (2.5–3.0 mm) as the material contains solid particles. The pressure is set in the range of 3–4 bar. Before applying to the car, be sure to do a test paint on cardboard or an unnecessary part. This will allow you to evaluate the torch, the size of the shagreen and avoid drips on the machine.
| Parameter | Meaning/Description | Note |
|:--- |:--- |:--- |
| Base | 4 liters (100%) | Bottle with base |
| Hardener | 1 liter (25%) | Added before use |
| Thinner | 30% - 50% | Adjusts the size of shagreen |
| Spray gun nozzle | 2.5 – 3.0 mm | Less - it will clog, more - strong fog |
| Pressure | 3 – 4 atm | Depends on the viscosity of the mixture |
The main mistake beginners make is the wrong proportion of thinner. A mixture that is too thick will form an “orange peel” that cannot be smoothed out, while a mixture that is too thin will lose its protective properties and fluidity.
Body coating process
Application Raptor produced in two layers. The first layer is a binder (primer). It is applied thinly, from a distance of 30-40 cm from the surface, so that the material does not flow. The task of the first layer is to create a base for the second. Between layers it is necessary to pause for interlayer drying. At a temperature of +20°C it is 30–60 minutes. The exact time depends on the humidity and temperature in the room: the material should stop sticking, but remain slightly sticky for better adhesion of the second layer.
The second layer is applied more generously, but also without fanaticism, to avoid drips. Movements with the gun should be uniform, overlapping the previous pass by 50%. It is important to hold the gun perpendicular to the surface at the same distance. If you change the distance or angle of inclination, the shagreen will turn out uneven, which will be noticeable. Pay special attention to the edges of doors, thresholds and arches - the material often flows due to surface tension.
⚠️ Attention: Do not try to paint over all defects and omissions the first time, increasing the thickness of the layer. This is guaranteed to lead to the formation of streaks, which are very difficult to remove after drying. It is better to apply a thin second coat, let it dry and, if necessary, carefully touch up locally.
If during the process you notice a large speck of dust or lint that has fallen onto a fresh layer, do not touch it immediately. Wait for the coating to dry completely (usually 24 hours), carefully sand off the defect with a fine abrasive and touch up the area. Trying to remove a defect from a “raw” material will only smear it and ruin the texture around it.
Drying, polymerization and finishing
Complete polymerization of the polyurethane coating takes about 21 days at room temperature, but initial drying occurs much faster. After 24 hours, the car can already be carefully operated, washed (without chemicals or high pressure) and assembled attachments. However, the material gains its final hardness and chemical resistance within the first two to three weeks. During this period, you should avoid aggressive washing with alkaline shampoos.
After complete drying, the surface can be lightly polished with a soft sponge or cloth to remove any “fog” (spray) if it has formed. Some owners cover Raptor special wax or ceramics for matte surfaces to facilitate subsequent washing and protect the pores from clogging with dirt. This is not mandatory, but prolongs the aesthetic appearance of the coating.
It protects against scratches and chips, but a strong impact with a sharp object or stone at high speed can damage the coating. Repairing such damage is simple: the damaged area is cleaned, degreased and locally tinted with the remaining mixture. Thanks to the texture, the transition border will be almost invisible.
Is it possible to paint in an unheated garage in winter?
Strongly not recommended. At temperatures below +15°C, the material loses its fluidity, shagreen becomes too rough, and the polymerization process is disrupted. The coating may remain sticky forever or may crack. Use heat guns to maintain temperature.
Common mistakes and how to avoid them
The most common mistake is poor degreasing. Even if the body is visually clean, invisible films of silicone or oil may remain on it, which will prevent paint from adhering. The result will be craters (“fish eyes”) or peeling off entire pieces of the coating. The second common mistake is ignoring humidity. Working in a damp garage will cause moisture to get into the paint layer, causing clouding (a whitish cast) or blistering when drying.
Beginners also often set up the spray pattern incorrectly. A torch that is too narrow produces streaks, while a torch that is too wide results in significant waste of material and fog that settles on adjacent parts as dry dust. Be sure to practice on scrap sheets of metal or cardboard. This will help you “feel” the material and understand at what distance to hold the gun.
And lastly, don’t skimp on drying time. An attempt to speed up the process by heating (for example, by pointing a heat gun too close) will cause the solvent inside the layer to boil and form bubbles. Polymerization should pass evenly. Following technology is the only way to get a coating that will delight you for years and will not require redoing after a season.
Can Raptor be applied over old paint or varnish?
Yes, you can, but only if the old coating holds tightly. It must be thoroughly matted (made matte) with P120-P180 sandpaper to remove gloss and create adhesion. If the old paint is blistered or peeling, it must be completely removed down to the metal.
How long does it take for the Raptor to dry before the car can be used?
Primary drying to touch occurs after 1-2 hours. You can assemble the car and drive carefully in 24 hours. Full chemical resistance and the ability to wash with chemicals is achieved after 7-14 days, depending on the ambient temperature.
How to wash a Raptor car?
Can be washed with water from a hose, a sponge with car shampoo or in touchless car washes. It is not recommended to use aggressive alkaline compounds and brushes with hard bristles in the first 2 weeks after painting, while the final polymerization process is underway.