Faced with the need for body repair, many car owners hear a strange word from the craftsmen - “parttime”. To an untrained person, this term may sound like a slang name for a part or a specific type of defect. In fact, part time (from the English part-time) in the context of body repair means partial painting of an element. This is a technology that allows you to restore a damaged area without completely repainting the entire part, be it a door, fender or bumper.
The essence of the method is that the paint is applied only to the damaged area with a smooth transition (shading) to the rest, the entire part of the element. This approach can significantly save time and money, as well as preserve the factory paintwork in undamaged areas. However, the technology has its own nuances that you need to be aware of before agreeing to Spot Repair.
In this article we will analyze in detail how exactly the process occurs, in which cases partial painting is justified, and when it is better to repaint the entire part. You will learn about color matching technologies, methods for polishing transitions, and how to distinguish quality work from artisanal work. Understanding these processes will help you make an informed decision and avoid problems with your car's appearance in the future.
What is hidden behind the term “parttime”
The term “parttime” comes from an English expression meaning “part-time” or “part-time,” but in the auto painting industry it has become a term for local repairs. When a master says that he will do part time, he means working with a specific area of the surface where a chip, scratch or abrasion has occurred. The main goal is to make the border between the old and new paint completely invisible to the eye.
Technology partial painting requires the highest qualifications of the painter. He needs not just to paint over the hole, but to choose the perfect shade, taking into account the fading of the main coating under the sun over the years of use. If you simply apply new enamel over the old one, even if selected according to the code, it will differ in tone. Therefore, a special technique called “transition” or “shading” is used.
⚠️ Attention: The quality of the party directly depends on the experience of the master. If the transition is done roughly, after a few months the border may appear in the form of a matte ring or a change in shade, which will require a complete repainting of the element.
There are two main types of transitions: by base (color) and by varnish. In the first case, the solvent helps to blur the boundary of the color layer, and in the second, the step of the varnish coating is removed by polishing. The choice of method depends on the type of paint (metallic, pearl or acrylic) and the nature of the damage.
Spot Repair technology
Execution Process Spot Repair (spot repairs) begins long before paint is applied. The first step is always surface preparation. The damaged area is cleaned, puttied (if there is a dent) and primed. It is important to cover an area slightly larger than the defect itself to ensure reliable adhesion of the materials.
After the primer has dried, base paint is applied. Here lies the main secret of part time: paint is applied not only to the area being repaired, but also to part of the adjacent area. The border of the base application is made torn, using a large amount of solvent. This allows the pigment to form a thin, translucent layer that visually blends with the base color.
Next comes the application of varnish. In the classic version, the entire part is varnished to avoid steps. However, with high-quality parttime, the varnish can also be applied with a transition. For this purpose, a special transition solvent, which softens the old varnish and allows the new material to spread without a visible boundary. After drying, the transition area must be polished with abrasive materials.
- 🛠️ Cleaning and degreasing the damaged area.
- 🎨 Selection of enamel taking into account the burnout of the main coating.
- 💨 Applying the base with shading of the edges.
- ✨ Varnishing and polishing of the transition zone.
It is important to note that it is more difficult to make an invisible part-time on dark colors (black, dark blue) than on light colors (silver, white). Darker tones are more susceptible to fading and have a more pronounced metallic effect, which is difficult to reproduce locally.
Pros and cons of partial painting
Like any technology, parttime has its strengths and weaknesses. The main advantage, of course, is the savings. You don't have to pay for the labor of removing, fully preparing and painting the entire part, and you don't have to spend extra materials. This is especially true for expensive elements, such as the hood or roof, where the consumption of materials is high.
In addition, partial painting preserves the factory finish on most of the part. Factory paint is applied under ideal conditions, observing temperature conditions and using cataphoresis, which cannot be repeated under normal service conditions. Preserving the “original” varnish is a plus for the liquidity of the car during future sale.
However, there are also risks. The main disadvantage is the difficulty of matching colors on old cars. If the car is more than 5-7 years old, even the most experienced colorist may not get the tone 100% correct, especially if complex three-layer pearls were used. In this case, parttime may look like a patch.
⚠️ Attention: It is not recommended to do part time on elements with a factory defect of “shagreen” (orange peel) if you do not plan to polish the entire part. Local repairs will differ in surface texture.
It is also worth considering that the warranty for part time is often less than for full painting. Craftsmen are afraid to make long-term commitments due to the risk of transition defects appearing during operation.
Why is part time visible on a black car?
Black is the most difficult color for local repairs. Any speck of dust, the slightest difference in the shade or texture of the varnish immediately catches the eye. In addition, black fades the most, and the difference between “fresh” and “old” paint becomes obvious even with a perfect match. On black cars, part time is done only in exceptional cases or on very new cars.
Comparison: Part time or full painting?
To help you make your choice, we have prepared a comparison table. It shows the key differences between the two paint restoration methods in different situations.
| Criterion | Part time (Partial) | Full painting |
|---|---|---|
| Cost | Low (30-50% of full) | High |
| Lead time | 1-2 days | 3-5 days |
| Preservation of factory paintwork | Maximum | Missing |
| Risk of missing the color | Medium/High | Minimum |
| Warranty | Usually 6-12 months | Up to 2-3 years |
The table shows that parttime wins in price and speed, but loses in the reliability of the result on older cars. Full painting gives a predictable result, but requires more resources. The choice often depends on the class of the car: for budget cars, part time is a great way to freshen up the look, for premium cars it’s a risk that not everyone takes.
If the damage is on the edge of the body or in a visible place (center of the door, hood), it is better to consider a full paint job. If there is a scratch near the handle, on the threshold or at the bottom of the bumper, parttime will be the ideal solution.
Before starting work, ask the master to do a test color on a test plate and dry it with a hairdryer. Only in dry form can you really assess whether the shade of the selected paint matches your car.
How to check the quality of work performed
When accepting a car after repair, you should not limit yourself to a quick glance. The quality of parttime should be checked in good lighting, preferably in daylight or under a bright lamp. Carefully inspect the transition area. If you see a clear border, a step of varnish or a matte ring, the work was done poorly.
It is also worth paying attention to the shagreen (texture). It should be uniform throughout the entire part. If at the transition point the shagreen is larger or smaller than on the rest of the part, this is a defect. The polishing may have been done too aggressively or, conversely, not enough.
Check for dust particles and “craters”. When painting locally, the area is smaller, but the risk of dust getting into the repair area is high if the chamber is not kept clean. Inspect the ends of the part and adjacent elements - there should be no traces of paint or polishing paste on them.
- 👀 Inspection from different angles to identify different tones.
- 🖐️ Tactile check of the smoothness of the transition (the finger should not feel the step).
- 🔍 Search for traces of grinding outside the repaired area.
- 🧼 Checking the cleanliness of adjacent parts and glass.
If you notice defects immediately, demand that they be corrected. Fresh varnish is still soft and some problems can be corrected by polishing. If time has passed and adhesion or color defects have appeared, rework may be required.
Is it worth doing part time before selling?
Frequently asked question: is it worth doing part time if you plan to sell a car? The answer depends on the condition of the rest of the body. If the car is in perfect condition and only one scratch spoils the look, it’s definitely worth it. This will increase liquidity and allow you to sell the car at a higher price.
However, if the body is scratched in a circle, there is no point in doing part time on one part. The buyer will still notice other defects, and the presence of painted elements (even partially) will require explanation. In such cases, it is better to leave everything as is or reduce the price.
It is important to remember about the thickness gauge. When selling, an experienced buyer will definitely check the thickness of the paintwork. Parttime will show an increase in thickness at the repair site, but this is a normal situation. The main thing is honesty. Tell the buyer that there was a local repair and show that it was done well.
⚠️ Attention: Do not try to hide the fact of painting by polishing before selling if the paint layer is thin. Abrasive polishing can wear the varnish down to the base, and then the defect will become even more visible, and the cost of repair will increase.
In conclusion, parttime is a great tool in a car painter's arsenal that allows you to work wonders with minimal effort. But, like any tool, it requires skillful handling. Weigh the pros and cons, assess the condition of your car and choose proven services.
☑️ Are you ready for party time?
Parttime means saving up to 50% of the cost with an ideal result, but only in the hands of a professional and in suitable colors.
Frequently asked questions (FAQ)
How long does it take for paint to dry after party time?
The time for complete polymerization (drying) of the varnish is from 24 to 48 hours at a temperature of about 20°C. During this period, it is not recommended to wash the car with active chemicals or drive on dirt roads. The varnish gains its final hardness in 7-14 days.
Is it possible to make parttime on plastic (bumper)?
Yes, you can. The technology is similar, but requires the use of special plastic primers and elasticizers for the varnish so that the coating does not rub off when the bumper is deformed. The quality of repairs on plastic is often even higher, since there is no risk of corrosion.
Does parttime guarantee no corrosion in the future?
Only high-quality preparation provides a guarantee. If the craftsman cleaned the metal well, applied anti-corrosion primer and properly insulated the edges, rust will not appear. However, if the technology is broken and moisture gets under the paint layer, corrosion can begin even faster than before the repair.
Is parttime visible on white?
White color (especially solid, not metallic) is considered one of the easiest for local repairs. It is extremely difficult to notice different colors on white, so part-time on such cars is successful in 95% of cases.