Small orange dots on the paintwork, known as “redheads”, are the first visible signs of incipient corrosion, requiring immediate intervention by the wearer. If you do not remove redheads from the car body with your own hands immediately after their detection, the process of oxidation of the metal will quickly go deep, turning into a through hole, the repair of which will require expensive body welding. Localization of the rust source at the initial stage allows you to save the factory layer of metal and do with minimal costs for consumables.
The reason for the appearance of such defects lies in the damage to the protective layer of paint or varnish, through which moisture and oxygen begin to contact unprotected steel. Most often this is due to flying from under the wheels of stones, the use of aggressive chemistry on sinks or mechanical scratches in careless parking. It is important to understand that a simple shampooing will not stop the chemical reaction, but only temporarily hide the problem, so a comprehensive approach to the restoration of LCD is necessary.
Diagnostics and workplace preparation
Before starting work, you must thoroughly wash the car and carefully inspect the problem areas in good light to determine the real extent of damage.
Often under one large "red" hides a whole network of microcracks, so your fingers need to probe the surface for bloating paint, which indicate deep corrosion.
For high-quality work, you will need to organize a clean, dry and well-ventilated room, since dust or moisture on low-fat metal is unacceptable.
Prepare all the necessary tools in advance so as not to interrupt the process, as fat-free It starts to oxidize in air in a matter of minutes.
- 🛠️ Abrasive materials of different grains to remove rust.
- 🧴 Degreasing agent and means for removing silicones.
- 🎨 Soil enamel or two-component soil for metal insulation.
- 🧽 Microfiber and clean rags without pile.
⚠️ Note: Do not try to paint redheads with ordinary spray paint without prior cleaning and priming - this only preserves moisture under the enamel layer, and after a month the rust will come out again.
Mechanical cleaning of corrosion sites
The main stage of the work is the complete removal of iron oxides from the surface of the body, for which a mechanical cleaning method is used.
First, gently cover the damaged area with P240 or P320 grain sandpaper, removing the rust layer until a pure, shiny metal appears.
Movements should be progressive and go beyond the damaged area by 1-2 centimeters to create a smooth transition and capture the area of hidden corrosion.
After rough sweeping, change the abrasive to a smaller one (P600-P800) and polish the edges of the transition between the old lacquer and the cleaned metal, making the boundary less noticeable.
If rust has formed in chipping sites where the metal has a recess, use a rust converter that will turn the oxide residues into a stable compound.
However, you cannot rely on chemistry alone: mechanical sweep It is the most reliable way to ensure that the process of body destruction is stopped.
Do I need to remove the paint completely?
If the rust went under the paint and formed a “bubble”, you need to clean up to the boundaries of this bubble, completely removing the detached LCP. You can not leave the overhanging edges of paint - there will always be moisture under them.
Chemical treatment and neutralization
After mechanical removal of the main mass of rust, it is recommended to carry out additional chemical treatment to neutralize the microscopic particles of oxides remaining in the pores of the metal.
Use special ones. rust-converter based on orthophosphoric acid, which are applied with a brush exactly on the cleaned area.
The exposure time of the chemical composition varies from 15 to 30 minutes depending on the manufacturer's recommendations, after which the surface should change color to dark gray or black.
Do not allow the transducer to dry out in air without the formation of a protective film, otherwise it can become hygroscopic and attract moisture.
| Type of instrument | Principle of action | Exposition time | Should I flush? |
|---|---|---|---|
| Converter (acid) | Chemical reaction with oxides | 15-30 minutes | No (if the soil is compatible) |
| Neutralizer | Blocking the reaction | 10-15 minutes | Yes, I will. |
| Zinc ground | Cathodic protection | Until drying out | No. |
After drying the transducer, the surface must be thoroughly degreased with antisilicone to remove the residues of chemistry and fat spots from the fingers.
The main rule: chemistry does not replace cleaning, but only complements it. If you do not remove the loose layer of rust mechanically, the acid will not reach the base of the metal.
Soiling and remediation
Cleaned and defatted metal cannot be left open, so the next step is to apply corrosion-resistant soil.
Best to use. epoxy or soil with zinc, which creates a barrier between the steel and the environment, preventing the reappearance of rust.
Apply the soil should be thin layers with intermediate drying, avoiding the leaks, which then have to be grinded for a long time.
If the area of repair is small, you can use a pencil or carpal soil, carefully filling only the damaged area.
- 🌡️ Observe the temperature regime indicated on the cylinder (usually not below +15 ° C).
- ⏱️ Keep the time of interlayer drying for the evaporation of solvents.
- 🌬️ Provide ventilation, but eliminate drafts that carry dust.
- 🧤 Use a respirator as soil vapors are toxic.
After the soil is completely dry (usually 2-4 hours), the surface is ready for application of base enamel (paint) and varnish.
Paint selection is better carried out according to the body code indicated on the plate in the doorway or under the hood to avoid discord.
☑️ Control before painting
Polishing and finishing
After the paint and varnish have dried (full polymerization takes up to several weeks, but you can grind it after 24 hours), you need to remove the visible transitions and shafts.
Use a polishing machine with abrasive paste to remove micro-nervities and align the shine in the repair area.
Movements with a polished circle should be smooth, without strong pressure, so as not to wipe the fresh varnish to paint or soil.
Finishing with soft paste will return the coating to a deep gloss and hide the boundaries between the old and new varnish.
⚠️ Warning: Do not polish the car immediately after painting unless the varnish has gained hardness – you will simply grease the fresh coating and leave matte spots.
To protect the repaired area, it is recommended to apply a ceramic coating or high-quality wax, which will enhance the hydrophobic properties of the varnish.
If you don’t have a polishing machine, you can use a manual method with abrasive clay and polyrene, but it will take significantly more time and physical effort.
Typical errors and prevention
The most common mistake when removing redheads from the body with your own hands is insufficient cleaning of the edges of damage.
Owners often paint only the center of the redhead, forgetting that the corrosion has already spread under the paint wide, and after a short time the defect manifests itself again.
Also, the degreasing stage is often ignored, which leads to poor adhesion of materials and peeling off repairs after a few months.
The use of poor quality materials or violation of drying technology also negates all efforts.
To prevent the appearance of new corrosion foci, wash your car regularly, especially after winter trips to the roads with reagents.
Timely paint fresh chips with a special remake, without waiting for the appearance of orange dots.
Storing a car in a garage or using a quality cover also prolongs the life of a paintwork.
Can you remove redheads without painting?
It is impossible to completely remove redheads without subsequent painting. It is only possible to temporarily preserve the process, but the visual defect will remain, and the metal will continue to collapse under the surface layer.
How much does it cost to remove redheads in the service?
The price depends on the number of foci and the policy of the STO. Local repair of one element can cost from 3000 to 7000 rubles, while with your own hands the costs will be 500-1000 rubles for materials.
Do I need to remove the part for repairs?
In most cases, the removal of the detail is not required. Local repairs are done on site, however, if the corrosion is through or on the edges, dismantling may be necessary for quality treatment of the back side.