Removal of type protective coating "liquid splasher" It is often necessary when selling a car, repainting the body or updating anticorrosion protection. Machine owners face this challenge when a layer of material loses elasticity, begins to crack, or simply doesn’t meet the new owner’s aesthetic requirements. The dismantling process can range from relatively simple to extremely time-consuming, depending on the quality of application and the age of operation.
The complexity of the procedure lies in the high adhesion of polyurethane compositions to paint coating (LCP). Raptor. and its analogues are designed to withstand the impact of stones, the effects of chemistry and temperature changes, so simply scrape it off with a knife without the risk of damaging the native paint will not work. Incorrect actions can lead to the need for a complete repainting of parts, which will cost a penny.
In this article, we will discuss in detail all known methods of dismantling, necessary tools and precautions. You will learn why heating can be dangerous for some types of plastic, which solvents actually work and which will only create porridge, and how to prepare the surface for subsequent work. A competent approach will save you nerves and money.
Assessment of coverage status and choice of method
Before taking up the tool, it is necessary to carefully inspect the condition of the protective layer. If the material was applied recently and qualitatively, it will hold monolith. In cases where polyurethane It has already gone bubbles or cracks, the task is simplified, since the integrity of the coupling with the base is broken. However, most often it is necessary to remove a whole, but unnecessary coating.
There are three main approaches to solving the problem: mechanical, thermal and chemical. The choice of method depends on what is under the layer of protection. If it is factory paint in good condition, the range of actions is wider. If the part has already been painted or has chipped to metal, aggressive chemistry or abrasives can cause irreparable harm.
It is also important to consider the type of surface. With smooth metal panels (doors, roof) it is easier to remove the material than with relief plastic expanders of arches or bumpers. In the recesses and textures of plastic spray-bag It gets stuck dead, and it is extremely difficult to clean it from there without damaging the structure of the plastic itself.
⚠️ Warning: Before starting work, be sure to check the reaction of the solvent or heating on an inconspicuous section of the body. Some types of factory paint can become cloudy or swell under the influence of aggressive substances or high temperature.
Essential tools and remedies
For the qualitative performance of the task will require a specific set of tools. Attempting to remove the coating with only a spatula and a rag is doomed to failure and will take a lot of time. Professional approach involves the use of both mechanical and chemical means of action.
First of all, you will need a hot air source. A building hair dryer is an indispensable element of the arsenal, household for such purposes is too weak. Special scrapers will also be required, preferably with soft or replaceable blades, to minimize the risk of scratches. For the chemical method, it will be necessary flushing based on esters or methylene chloride.
Do not forget about personal protection. Solvent vapors are toxic, and fine dust from the material being cleaned can get into the airways. It is necessary to work in a well-ventilated room or in the open air.
- 🛡️ Building dryer with temperature adjustment (up to 600 ° C)
- 🔪 Plastic and metal spatulas of different widths
- 🧤 Protective gloves (nitrile or rubber) and respirator
- 🧴 Specialized washing for polyurethane coatings
- 🧽 Pileless rags and degreaser
☑️ Preparation of the workplace
Thermal method of removal of raptor
Heating is one of the most popular methods, since polyurethane softens with increasing temperature and loses its adhesive properties. The essence of the method is to locally warm up the coating area to a state where it can be easily cut or scraped off. This requires a certain skill to avoid overheating the metal.
The process begins with warming up the area of approximately 20x20 cm. The jet of hot air is directed perpendicular to the surface, constantly moving the hair dryer so as not to create a point of overheating. As soon as the material becomes soft and sticky, it is tucked with a spatula and carefully tightened. If the layer is thick, the procedure is repeated several times, removing the material in stages.
Particular attention should be paid to the edges of the parts and the places of joints. There the material is often melted thicker, and they need to be warmed up more carefully. However, it is in these areas that the risk of damage to the LCP is high if the spatula slips. After removing the main layer, the surface often requires additional cleaning of the residues.
⚠️ Warning: Do not overheat metal parts red. High temperature can lead to deformation of the thin metal, detachment of the factory soil or bloating of paint. The optimal surface temperature is about 150-200 degrees.
Danger to plastic elements
When working with bumpers and arch expanders, use the minimum temperature of the hair dryer. Plastic can deform or melt faster than the raptor softens. In such cases, it is better to combine low heat with chemistry.
Chemical exposure and flushing
The chemical method is considered less labor-intensive in terms of physical effort, but more demanding in terms of time and safety. Specialized formulations penetrate the structure of the polymer, causing its swelling and stratification. On the market are both universal washings of paint, and products specifically sharpened for polyurethane protection.
The technology of application is simple: the composition is applied by brush or sprayer to the surface and is kept for a certain time, specified by the manufacturer. This usually takes 15 minutes to several hours. During this period, the active substances break the polymer bonds, turning the solid coating into a jelly-like mass, which is easy to remove with a spatula or wash off with water under pressure.
The main risk here is the aggressiveness of the chemistry in relation to varnish and paint. Cheap solvents can "eat" not only the raptor, but also the glossy layer of the body, leaving matte spots. So, the choice professional chemistry critical. After using the flushing, the surface must be thoroughly washed and degreased.
| Type of instrument | Exposition time | Efficiency | Risk to LCP |
|---|---|---|---|
| White Spirit/Kerosene | Low (requires soaking) | Low. | Minimum |
| Acetone / 646 solvent | Medium | Medium (softens) | Tall (poor varnish) |
| Special. polyurethane flush | 15-40 minutes. | Tall. | Medium (requires control) |
| Dichloroethane (technical) | Fast. | Very high. | Critical (hazardous to plastic) |
To enhance the effect of chemical flushing, you can cover the treated area with a polyethylene film. This will prevent the evaporation of active substances and accelerate the reaction.
Mechanical cleaning and abrasives
The mechanical method is often used as auxiliary or as the main one for severely damaged coatings. It involves the physical cutting or sanding of the raptor layer. Using a power tool such as a Bulgarian or grinder requires extreme caution because of the risk of rubbing through the metal.
The most gentle option is the use of sandblasting (soft-blast) with a special small fraction (for example, soda or soft granulate). This method allows you to knock out the coating from the pores and irregularities without touching the base metal. However, to carry out such an operation requires special equipment and skills, so they often turn to specialized services.
If we are talking about manual cleaning, then use abrasive circles on Velcro or petal discs. It is important to select the grain so as to remove only the protective layer. Rough sandpaper will leave deep risks, which then have to be taken out for a long time with putty and soil. Mechanical processing Always leaves traces that require subsequent restoration of the LCP.
- 🌀 Using "coral" discs for soft removal
- 🌬️ Soda Blasting (Soda Blasting)
- 🪣 Application of ice-jet installation (cryogenic cleaning)
- ✋ Manual cleaning with hard brushes (for finishing)
Cleaning of hard-to-reach places and final processing
After removing the main array of material, traces always remain in hidden cavities, doorways, under seals and in the places where moldings are fastened. These areas cannot be ignored, since under the remains of glue or polymer, a corrosion process can begin. The humidity falling under the remnants of the coating creates its black work.
To clean difficult places, it is convenient to use toothbrushes dipped in a solvent, or cotton swabs. A high-pressure jet washer (Karcher) is also effective, especially if the material has been preheated or treated with chemistry. The water pressure is able to knock out softened remnants from microcracks.
The final stage is the preparation of the surface. If you plan to paint a part, it must be cleaned, degreased and primed. If the goal was simply to remove the protection and leave the body as it is (for example, under the factory varnish), then the surface must be polished to remove the mattage and minor defects left after the glue.
⚠️ Warning: Chemical residues in the joints and joints may continue to vaporize or react with new materials. Wash all depressions thoroughly with neutral detergent after using aggressive solvents.
The combined method (heating + mechanics + light chemistry for residues) is the most effective and safe for the body, allowing you to keep the native LCP intact.
Frequently Asked Questions (FAQ)
Can you remove the raptor with acetone without damaging the paint?
Using pure acetone or solvent 646 is risky. They can dissolve not only polyurethane, but also the lacquer layer of the car, especially if the paint is not (not factory) or already has microcracks. It is better to use specialized washes, which indicate compatibility control with the LCP.
How long does it take to remove protection from one detail?
The time depends on the method and condition of the coverage. Heating and cutting off the wing can take anywhere from 40 minutes to 1.5 hours. The chemical method requires exposure time (up to 2 hours), but less active work. Sandblasting by a professional will take 15-20 minutes per detail.
Will there be any traces of glue after removal and how to remove them?
Yes, the sticky layer almost always remains. You can remove it with white spirits, special cleaners of bitumen and glue (Antisil) or heated diesel fuel. After removing the glue, the surface is necessarily polished.
Do I need to lay the body after removing the raptor?
If you did not damage the metal and native soil, then polishing is enough. If there are foci of corrosion or deep scratches to the metal, then stripping, priming and painting are mandatory, otherwise the rust will go under varnish.