BMW M5 F90 Wheel Repair Review: Gloss Black Powder Coating

Restoring the BMW M5 F90's Wheels in Gloss Black

A stunning BMW F90 M5 Competition, finished in Maribei Blue, arrived at our shop. The vehicle already featured wheels coated in champagne gold. The owner requested a transformation to a sleek gloss black finish. This review details the comprehensive wheel repair and refinishing process undertaken at Today's Car Cheonan.

The initial inspection revealed the wheels had an existing coating. This necessitated a thorough stripping process to prepare for the new finish. While minor scratches were present, there was no deep structural damage, making the wheels ideal candidates for a complete restoration. The primary task was to remove existing contaminants and prepare a pristine surface.

The Crucial Wheel Stripping Process

Before applying any new coating, the old paint must be completely removed. This critical step, known as stripping, involves more than just sandblasting. We utilize specialized chemical treatments from professional stripping services to ensure a perfectly clean canvas for the new finish. This process is akin to preparing a blank canvas for an artist.

Because this stripping is handled by an external specialist, it requires additional time, typically 24-36 hours (1-2 days). This essential step cannot be skipped for a durable and flawless finish. Customers should be aware that same-day service is not possible for this type of comprehensive wheel repair.

Achieving the Gloss Black Finish with Powder Coating

Once the wheels returned from the stripping process, the refinishing began. The entire surface was prepared using sandblasting to create a micro-texture for optimal adhesion. Following this, the wheels were meticulously cleaned and degreased.

The wheels were then preheated to 180°C (356°F). This high temperature is crucial for maximizing the adhesion of the powder coating. As the black powder is applied, it melts and fuses to the hot surface, creating a uniform and lustrous gloss finish. This self-bonding principle ensures a robust coating.

After the initial gloss black powder coating, the wheels exhibited a brilliant shine. However, to enhance the durability and adhesion of the clear coat, a "re-texturing" process was performed. This involves a light surface treatment.

This stage also serves as a quality control measure, removing any dust or contaminants that may have settled during the initial coating. The wheels were washed again and preheated to 180°C before the second application.

The Final Gloss: Clear Coating for the M5 Wheels

Applying the clear coat transformed the matte surface into a high-gloss finish. This is the signature look of a true gloss black wheel, offering a dynamic appearance that shifts with light, a key advantage of the powder coating method.

Following the clear coat application, the wheels underwent a final curing process at 180°C. Powder coating offers excellent durability, even in humid conditions like the rainy season, ensuring a hard finish resistant to damage. While the wheels are ready for immediate use, avoiding washing for the first three days is recommended for optimal curing.

The typical lifespan for powder-coated wheels is 3-5 years, though this can vary based on driving conditions and maintenance. Regular care can extend this significantly, with many owners enjoying their refinished wheels for over five years.

Tire Mounting and Final Inspection

To prevent any scratches during tire installation, protective tape was applied to the wheel edges. This attention to detail is vital for a flawless finish. After mounting, ensuring the wheel balance is set to zero is essential.

A final inspection confirmed that all four wheels and tires were correctly mounted and balanced. The BMW "M" emblems were reapplied, and the center caps were polished to complete the restoration, returning the M5 to its owner with wheels looking brand new.