What kind of paint is used for engine painting?

[Faunus]

Engines are heat-generating bodies and cannot be painted. Here is some information about engines: 1. Introduction: An engine (Engine) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines typically convert chemical energy into mechanical energy. Engines can refer to both the power-generating device and the entire machine including the power unit (e.g., gasoline engines, aircraft engines). The engine was first developed in the UK, so the concept of the engine also originates from English, with its original meaning referring to "a mechanical device that generates power." 2. External Combustion Engine: An external combustion engine means that its fuel burns outside the engine. It was invented in 1816 by R. Stirling of Scotland, hence it is also called a Stirling engine. The engine converts the thermal energy generated by this combustion into kinetic energy. The steam engine improved by Watt is a typical example of an external combustion engine. When a large amount of coal burns to generate heat, it heats water into a large amount of steam, creating high pressure. This high pressure then drives mechanical work, completing the conversion of thermal energy into kinetic energy.

[Bilbo]

Last year, I tried painting my old car's engine myself. First, I learned that regular automotive paint wouldn't work because engine temperatures can exceed 200°C, causing ordinary paint to bubble and peel under heat. You need specialized high-temperature paint, such as industrial-grade heat-resistant spray paint or automotive high-temperature enamel, which can withstand temperatures above 150°C. I bought an epoxy resin spray paint in a can, which was easy to use. Before spraying, remember to thoroughly clean the engine surface, removing oil and rust, then apply the paint evenly. Avoid spraying on a hot engine to prevent accidents. Darker colors are better at hiding dirt but may lack shine—I used matte black, which worked well. After finishing, the engine looked brand new, and over a year later, the paint remains intact with no cracking. I recommend checking the product specifications beforehand to ensure it meets high-temperature requirements.

[VanDonovan]

Having worked in an auto repair shop for several years, I've noticed that engine painting requires special heat-resistant coatings, such as ceramic-based high-temperature paint or corrosion-resistant industrial paint. Regular paint melts under high temperatures, but professional products can remain stable in continuous 130-170°C environments, protecting the engine from rust and corrosion. The key lies in adhesion—I've seen cases where cheap paint was used, leading to peeling that blocked cooling vents. I recommend using reputable brands of high-temperature spray paint, like 3M's. Before spraying, sand the surface to ensure it's free of oil and dust; two thin coats usually yield good results. Be careful not to spray onto electrical circuits or air intakes to avoid short-circuit issues. The cost is reasonable—a can costs just a few dozen yuan and is sufficient. For a more professional finish, using a spray gun can save paint.

[ElliotFitz]

My used car's engine kept rusting, so I switched to high-temperature resistant paint. This type of paint is usually industrial-grade epoxy or silicone-based, capable of withstanding heat up to 200 degrees Celsius. There are many color options available, and I chose silver for its good reflectivity and heat dissipation. Before spraying, the engine must be turned off and cooled down, with all dust wiped clean, then apply three thin coats directly. After the job, the engine bay looks shiny, and I don’t have to worry about the paint peeling off during long drives due to overheating. One application can last for several years.

[LeGia]

From a material perspective, engine surface paint must use high-temperature specialized coatings, commonly ceramic-reinforced heat-resistant paint or polyurethane spray paint. These paints contain special particles that disperse heat, preventing cracking or discoloration under 200°C temperatures. In terms of operation, old paint must first be removed, then sanded smooth with sandpaper. Note that the paint must not contain flammable solvents to avoid spraying in sealed garages. Industrial-grade brands like POR-15 are recommended on the market for their corrosion resistance and eco-friendliness. After spraying, it's advised to let it dry for at least 24 hours before starting the engine to allow the paint to fully cure. DIY can save a few hundred dollars, but professional application is more reliable.

[SarahRose]

Engine painting requires high-temperature paint. I prefer a cost-effective DIY approach. Industrial heat-resistant paint is sufficient, capable of withstanding around 150°C, costing about 20-30 yuan per can. Regular paint won't work as it will scorch and smoke when the engine heats up. Ensure the engine is completely cool before spraying, remove all dust and grease, and apply two coats for even coverage. Avoid overly bright colors; gray or black is more durable. I also added a transparent heat-resistant coating for protection. After over a year of use, the paint remains intact, saving money and preventing rust. Regularly inspect to avoid paint layer damage.