Degreasing the body is a mandatory step before any serious procedure: from local chip repair to complete car painting. Even invisible grease films, silicone polishes or road pollution can cause paint peeling, bubbles on the putty or uneven application of protective coatings. But how to choose a product among dozens of options - from budget white spirit to professional antisilicon type APP W700? And why do experienced painters never use gasoline or acetone for final finishing?
In this article we will analyze 3 types of degreasers (universal, specialized, folk), their pros and cons, as well as critical errors, which negate all body preparation. For example, did you know that degreasing with microfiber after antisilicone can leave new fatty traces? Or that some products corrode plastic parts after just 10 minutes of contact?
You will also find:
- 🔍 Comparison table 10 popular products with prices and areas of application
- ⚠️ 5 prohibited compounds, which spoil metal and paintwork
- 📋 Step by step instructions with a checklist for beginners
- 💡 Professional lifehackshow to check the quality of degreasing without special equipment
Why degreasing the body is not just “wipe with a rag”
Always present on the surface of the body invisible film of dirt:
- 🛢️ Oil traces from road dust, exhaust gases, bitumen
- 🧴 Silicone residues after polishes or car shampoos
- 👆 Fat prints by hand (even after washing!)
- 🚗 Technical pollution: brake fluid, bearing lubrication
These substances change surface tension metal and paintwork. For example, paint applied to silicone film may gather into drops (fish-eye effect) or peel off after a few months. Putty on a greasy surface does not adhere evenly, which leads to cracks after drying.
The key problem is not all products cope with all types of pollution. For example, white spirit dissolves oils well, but is powerless against silicones, and isopropyl alcohol Removes traces of polishes, but will not cope with bitumen stains. That's why professionals use multi-stage cleaning system.
3 types of degreasing products: what to choose for your task
All degreasers are divided into three groups. Their choice depends on body material (metal, plastic, carbon fiber), type of post-processing (painting, putty, vinyl sticker) and degree of pollution.
1. Universal solvents (for rough cleaning)
Suitable for primary removal of heavy contaminants: bitumen, resins, old mastic. Their disadvantage is their aggressive effect on paintwork and rubber seals.
- 🔥 White spirit - classic for metal, but requires careful rinsing
- ⛽ Kerosene/gasoline "Galosh" - cheap, but leaves a greasy film (requires additional cleaning)
- 🧪 Solvent 646 - strong, but corrodes plastic and rubber
2. Specialized anti-silicones (for final processing)
Used just before painting or puttying. Even microscopic traces of silicones and waxes are removed.
- 💎 APP W700 - standard for professionals (does not leave streaks)
- 🔹 Body 700 - a budget analogue, but with a pungent odor
- 🌟 3M General Purpose Adhesive Cleaner - universal for metal and plastic
3. Traditional and alternative methods
Suitable for local work or when you need to save money. The main risk is an unpredictable result.
- 🧻 Isopropyl alcohol 90%+ – removes traces of polish well
- 🍊 Citrus Cleaners (for example, Citrol) - environmentally friendly, but weak for heavy pollution
- 🧼 Soap solution + soda alkaline cleaner - only for pre-wash
Before using a new product, always test it for invisible area of the body (for example, under the hood). Some solvents may wash off the factory primer or change the color of the metal.
Comparison table of 10 popular degreasing products
| Means | Type | Scope of application | Pros | Cons | Price (500 ml) |
|---|---|---|---|---|---|
| APP W700 | Antisilicone | Final cleaning before painting | Does not leave streaks and evaporates quickly | Expensive, strong smell | ~800 rub. |
| White spirit | Universal solvent | Rough metal cleaning | Cheap, available | Needs rinsing, smell | ~150 rub. |
| Isopropyl alcohol 99% | Alternative | Removing polishes, cleaning plastic | Safe for paintwork, no streaks | Doesn't handle oils | ~300 rub. |
| Body 700 | Antisilicone | Pre-painting preparation | Cheaper than APP, good quality | Strong smell, takes longer to evaporate | ~500 rub. |
| 3M Adhesive Cleaner | Universal | Metal, plastic, glass | Does not damage surfaces | Expensive, hard to find | ~1200 rub. |
For budget renovation a combination will do white spirit to isopropyl alcohol. For professional painting required antisilicone (APP or Body). If you work with plastic parts, avoid acetone-based solvents - they cause microcracks.
Step-by-step instructions: how to degrease the body before painting
The process consists of 4 stages. Skipping any of them can lead to paintwork defects.
- Body wash — removal of visible dirt and dust. Use car shampoo with degreasing effect (for example, Karcher RM 801). Water temperature - 30-40°C.
- Rough cleaning - applying a solvent (white spirit, kerosene) to
clean lint-free cloth. Movements are in a circle, without pressure. - Final degreasing - processing antisilicon (APP W700) using
new napkin. Important: change the napkin every 30-50 cm²! - Quality control — checking for “water purity” (see next section).
Remove all stickers and bitumen stains|Use separate wipes for each stage|Work with gloves and a respirator|Check the quality of degreasing with a “water test”|Do not touch the treated surfaces with your hands-->
Critical beginner mistakes:
- ❌Usage the same napkin for rough and final cleaning - transfers dirt back!
- ❌ Degreasing under direct sunlight — the solvent evaporates too quickly, not having time to act.
- ❌ Pass control test — 30% of painting defects are associated with poor degreasing.
What happens if you don’t degrease the body before painting?
Painting on a greasy surface leads to:
1) Peeling paint after 3-12 months (especially on the edges of parts).
2) "Fish Eye" — the paint collects in drops due to uneven surface tension.
3) Bubbles in putty — fats and silicones prevent adhesion.
4) Corrosion under paintwork — the oil film retains moisture, causing rust even on galvanized metal.
How to check the quality of degreasing: 3 professional methods
Even if the surface visually clean, microscopic contaminants may remain on it. Here's how to identify them:
1. “Pure water” test (the simplest)
Apply to surface distilled water from a spray bottle. If:
- 💧 Water spreads evenly — high-quality degreasing.
- 💦 Water gathers into drops — grease or silicone traces remain.
2. UV lamp test (for professionals)
Some contaminants (for example, silicones) glow in ultraviolet. Use a 365 nm UV lamp - the residue will appear as blue or green spots.
3. Adhesion test (for putty)
Apply to a small area quick-drying putty (for example, Novol Plus). If after 10 minutes she:
- 🔧 Holds up well - You can putty the entire part.
- 🚫 Peels or cracks - need to be degreased again.
If the water test shows a bad result, never wipe the surface dry cloth - this will only smear the dirt. Use new solvent and clean napkin, then repeat the test.
5 prohibited products: what to NEVER use for degreasing
Some solvents absolutely not suitable for body work. Their use leads to:
- 🔥 Damage to paintwork (dullness, microcracks)
- 💀 Toxic fumes (risk of poisoning)
- 🚗 Metal corrosion (even on galvanized)
⚠️ Attention! Acetone and products based on it (solvent 647) corrode primer and putty. If you have already applied primer, the acetone can penetrate through it and ruin the adhesion of the paint.
| Prohibited substance | Why not | What to replace |
|---|---|---|
| Acetone | Corrodes plastic, primer, leaves microcracks on paintwork | White spirit or isopropyl alcohol |
| Gasoline AI-92/95 | Leaves a greasy film and is explosive | Gasoline "Galosha" (for rough cleaning only) |
| Baking soda/vinegar | Does not remove silicones, may cause corrosion of aluminum | Special car shampoos (for example, Sonax Full Effect) |
| Household detergents (Fairy, AOS) | Contain surfactants that penetrate metal micropores | Car shampoos with neutral pH |
| Ethyl alcohol 70% | Evaporates too slowly, leaves moisture behind | Isopropyl alcohol 99% |
If you are working with aluminum or magnesium parts (for example, on Audi, Jaguar), avoid alkaline cleaners - they call intergranular corrosion. Suitable for such metals only specialty chemistry (for example, Wurth Aluminium Cleaner).
Degreasing before applying vinyl or tinting: features
When preparing the body for pasting with film or tinting Degreasing requirements are higher than before painting. Here it is critical perfect adhesion, since the film can peel off even from microscopic contaminants.
Algorithm of actions:
- Surface cleaning isopropyl alcohol 99% (will remove traces of polish).
- Processing antisilicon (for example, 3M Adhesive Cleaner).
- Check "stickiness": press to the surface
tape— if a characteristic sound is heard when tearing off, you can glue it.
⚠️ Attention! When pasting glossy surfaces (e.g. roofs) never use white spirit - he leaves matte film, which will be visible under the transparent film. Only alcohol or antisilicon!
For window tinting suitable only lint-free cloth + isopropyl alcohol. Even microscopic lint from paper towels can cause bubbles under the film.
If you glue vinyl on plastic parts (bumper, spoiler), pre-treat them plastic primer (for example, APP Plastic Primer). This will improve adhesion and prevent peeling after 1-2 years.
Frequently asked questions about body degreasing
❓ Is it possible to degrease the body with regular alcohol (vodka, medical alcohol)?
No. Ethyl alcohol (even 96%) contains water and impurities, which:
- Slow down evaporation (risk of corrosion).
- They leave streaks on the paintwork.
Use only isopropyl alcohol 99% or specialized means.
❓ How long should it take between degreasing and painting?
It depends on the product:
- White spirit/kerosene: minimum 20-30 minutes (you need to let the residue evaporate).
- Anti-silicones (APP, Body): 5-10 minutes (evaporate quickly).
- Isopropyl alcohol: can be painted immediately after drying (1-2 minutes).
If the room humidity is high (>60%), increase the drying time by 30-50%.
❓ How to degrease the body if there are no special means?
As a last resort you can use:
- Isopropyl alcohol 90%+ (pharmacy grade will not work!).
- Carburetor Cleaner (for example, ABRO CC-220) - only for metal, not for plastic!
- Distilled water + laundry soap 72% — for preliminary cleaning (not final!).
But remember: the risk of paintwork defects increases 3-5 times.
❓ Is it necessary to degrease a new body before painting?
Yes! Even new parts from the factory packaging may have:
- 🧤 Traces from the hands of workers.
- 🛢️ Preservation lubricant (on parts from China, Turkey).
- 🏭 Dust from transportation.
Process the part antisilicon and test with distilled water.
❓ Is it possible to use one napkin for the entire body?
Absolutely not! One napkin can:
- 🔄 Transfer dirt from one area to another.
- 🧴 Accumulate the solvent and spread it over the surface.
Rule: 1 napkin = 1 stage = 1 piece. For example:
- Cloth No. 1 - rough cleaning with white spirit.
- Cloth No. 2 - final degreasing with anti-silicone.