Aerosol paint in a can with a code RAL 9005 on the label is not always suitable for painting a plastic bumper - even if the color matches. The reason is in the composition: nitro enamels will crack on flexible parts in a month, and acrylic without primer will peel off from the metal over the winter. The choice of paint type depends on the base material, operating conditions and required durability. For example, disks require heat-resistant compounds with operating temperatures up to +300°C, and for the interior - elastic paints with a low solvent content, so as not to damage the leatherette.
In this article we will analyze 12 types of aerosol paints according to their chemical composition, purpose and compatibility with materials. We will indicate which brands (Motip, Kudo, Bosny) specialize in specific tasks - from scratch restoration to complete painting of parts. Let's separately focus on the mistakes: why hammer paint does not apply to aluminum without preparation, and how to correctly combine primer, base and varnish in cans for a long-lasting result.
1. Acrylic paints: versatility and durability
Water-based or organic-based acrylic aerosols are the most common choice for body repair. They are suitable for metal, plastic (provided they are primed) and even wood. The main advantage is resistance to UV rays and temperature changes (from -50°C up to +80°C). For example, Motip Acryl Lack Retains gloss for up to 5 years when applied correctly.
For cars use two-component acrylics (with hardener in a separate bottle) - they are harder and more resistant to detergents. Single-component ones are suitable for temporary repairs or decoration. Important: acrylic requires a primer on bare metal, otherwise corrosion will appear in 6-12 months.
- ✅ Pros: wide color range (including metallic and mother-of-pearl), good adhesion, polishable.
- ❌ Cons: take a long time to dry (24 hours until complete polymerization) and require varnishing for gloss.
- 🔧 Application: body parts, wheels (with heat-resistant varnish), plastic body kits.
⚠️ Attention: Do not apply acrylic to old nitro enamels - solvents in acrylic can “eat” the bottom layer, causing bubbles. Test compatibility on a small area before painting.
For perfect coverage use Motip Clear Lacquer - It is compatible with most acrylic bases and adds depth of color.
2. Nitro enamels: fast, but short-lived
Nitrocellulose paints (eg. Kudo Nitrocellulose) dry in 15–30 minutes and give a bright gloss without varnish. They are often chosen for express repair or painting parts that are not subject to mechanical stress (for example, interior elements). However, nitro enamels have critical disadvantages:
- 💥 Low durability: fade in the sun within 1-2 seasons, crack when temperature changes.
- 🚫 Incompatibility: Do not apply over acrylic or alkyd paints - peeling will occur.
- ☠️ Toxicity: contain acetone and other aggressive solvents (use a respirator!).
The only justified use of nitro enamels in cars is painting small plastic parts (for example, door handles or buttons) followed by protection with clear varnish. For metal or exterior body panels, use acrylic or alkyd compounds.
| Paint type | Drying time | UV resistance | Does it require varnish? | Price per bottle (400 ml), ₽ |
|---|---|---|---|---|
| Acrylic (Motip) | 24 hours | ⭐⭐⭐⭐⭐ | Yes | 800–1200 |
| Nitroenamel (Kudo) | 15–30 min | ⭐ | No | 300–500 |
| Alkyd (Bosny) | 8–12 hours | ⭐⭐⭐⭐ | Optional | 600–900 |
| Hammerite | 4–6 hours | ⭐⭐⭐ | No | 700–1100 |
3. Alkyd paints: balance of price and quality
Alkyd aerosols (Bosny Alkyd, Dupli-Color) occupy an intermediate position between acrylic and nitro enamels. They are cheaper than acrylic, but stronger than nitro paints. Main feature - self-leveling texture, which hides minor surface defects. Alkyds are suitable for:
- 🚗 Metal parts (thresholds, arches, frames) - resistant to chips.
- 🔧 Tools and garage equipment — are not afraid of oils and gasoline.
- 🌡️ Moderate temperatures (up to
+120°C), therefore not suitable for exhaust systems.
Key nuance: alkyd paints require mandatory grinding before application (grain P320–P400). Without this, adhesion will be weak. For gloss, you can varnish, but this is not necessary - alkyds already give a semi-gloss surface.
4. Hammer paints: protection and decoration without varnish
Hammer enamels (Hammerite, Dali) create a textured coating with a “chasing” effect that masks unevenness and does not require varnishing. Their main advantage is anti-corrosion properties: Contains rust inhibitors, so they can be applied directly to rusty metal (after cleaning loose layers).
Limitations of hammer paints:
- 🔨 Only for metal — does not stick to plastic or wood.
- 🎨 Limited palette (mostly grey, black, blue, green).
- 🌡️ Temperature limit - up to
+150°C, therefore not suitable for silencers.
For cars, hammer paints are used on invisible details: frames, fastenings, internal surfaces of the hood. For external panels, it is better to choose acrylic - the hammer texture collects dirt and is difficult to clean.
How to Apply Hammer Paint to Rust
1. Clean the surface with a wire brush or sandblast. 2. Degrease White spirit or Antisilicon. 3. Apply 2-3 thin coats at 10 minute intervals. 4. Dry for 24 hours at +20°C (you can’t speed it up with a hairdryer!).
5. Heat-resistant paints: for wheels, mufflers and engine
For parts that heat up above +100°C, you need specialized heat-resistant aerosols. They are divided into three groups:
- Up to +200°C (Bosny High Temp) - for brake calipers, exhaust pipes (not manifold!).
- Up to +400°C (VHT FlameProof) - for mufflers, catalysts, turbines.
- Up to +650°C (Rust-Oleum High Heat) - for exhaust manifolds, chimneys.
Important: heat-resistant paints require preheating details up to +50–60°C before application. This improves adhesion. After painting, dry at room temperature for 2 hours, then warm the part to operating temperature (for example, drive 10–15 km by car).
⚠️ Attention: Do not confuse heat-resistant paints with “heat-resistant” paints (for stoves). The latter contain silicates and are not intended for cars - they are fragile and will break off due to vibration.
6. Paints for plastic: elasticity and adhesion
Plastic parts (bumpers, spoilers, mirrors) require paints with increased elasticityso as not to crack due to deformation. In the cans, look for the marking “Plastic Primer" or "Flexible" Top Brands:
- 🔹 Motip Plastic Paint — for hard plastic (ABS, polypropylene).
- 🔹 Dupli-Color Plastic & Vinyl - for soft plastic and leatherette.
- 🔹 Kudo Flex — a budget option for bumpers.
Plastic painting technology:
- Process the part antistatic (plastic attracts dust).
- Apply primer for plastic (for example, Motip Plastic Primer) - it improves grip.
- Paint in 2-3 layers at 15 minute intervals. Let dry for 24 hours before varnishing.
☑️ Preparing plastic for painting
7. Special paints: chrome, fluorescent, anti-gravel
For non-standard tasks, highly specialized aerosols are used:
- 🌈 Chrome imitators (Spray Chrome, Alclad Chrome) - create a mirror effect, but require a perfectly smooth surface and varnishing.
- 💡 Fluorescent (Montana Fluorescent) - glow in UV rays, but fade within a season.
- 🛡️ Anti-gravel (3M Stone Guard) - protect sills and arches from chips, but have a rough texture.
- 🖌️ Liquid rubber (Plasti Dip) - removable covering for temporary tuning.
Warning: chrome paint not heat resistant - they cannot be used on disks or the engine. Fluorescent compounds are toxic (contain xylene-based solvents), so work in in a well-ventilated area with a respirator.
8. How to choose spray paint: checklist for material
Use this table for quick selection:
| Part material | Recommended paint | Soil | Varnish | Brand example |
|---|---|---|---|---|
| Steel body | Acrylic 2K or alkyd | Epoxy | Yes | Motip, Bosny |
| Aluminum (wheels) | Heat resistant acrylic | Acidic | Yes (heat resistant) | VHT, Dupli-Color |
| Plastic (bumper) | Elastic acrylic | For plastic | Yes | Motip Plastic |
| Cast iron (muffler) | Heat resistant +600°C | Zinc | No | Rust-Oleum |
| Leatherette (interior) | Low solvent acrylic | No | Matte | Dupli-Color Vinyl |
For a long-lasting result, always combine: primer + paint + varnish from the same brand line. For example, Motip Grundierung (ground) + Motip Acryl (paint) + Motip Klarlack (varnish).
FAQ: Frequently asked questions about spray paints
Can I spray paint over old paint?
Yes, but only if the paint is old does not peel off and compatible by type (e.g. acrylic over acrylic). Before painting:
- Sand the surface with sandpaper
P1000–P1200. - Degrease Antisilicon.
- Apply adhesive primer (for example, Motip Haftgrund).
Do not paint with acrylic over nitro enamel or alkyd without a compatibility test!
How many cans do you need to paint a bumper?
Consumption depends on the size of the bumper and the number of layers:
- Small bumper (for example, on VW Polo): 1–2 cans (400 ml) of paint + 1 varnish.
- Big bumper (for example, on Toyota Land Cruiser): 3 cans of paint + 2 varnish.
Advice: buy paint with a 20% reserve - for repainting scratches.
How to avoid smudges when painting?
Leaks occur due to:
- Too close (keep the cylinder at
20–30 cmfrom the part). - Thick coat (apply 3 thin coats at 10-15 minute intervals).
- High temperature (paint at
+18–25°C).
If a smudge has already appeared, wait until it dries and carefully cut it off blade, then polish.
Which paint to choose for wheels: powder or spray paint?
Powder painting is stronger, but a spray can is suitable for temporary repairs or tuning. Use:
- Heat resistant acrylic (VHT Wheel Paint) - up to
+200°C, requires varnish. - Epoxy paint (Rust-Oleum) - chip-resistant, but limited palette.
Important: before painting remove old paint by sandblasting and apply zinc primer.
How to paint rust without stripping?
Only hammer paints (Hammerite) or anti-corrosion primer enamels (Dali Antirust) can be applied to rust without complete stripping. But:
- Loose rust must be removed brush or sandpaper.
- The thickness of the rust layer should not exceed
0.1 mm. - After painting the coating will last 1–2 years (vs. 5–7 years with complete stripping).