Wheel arch
The wheel arch is the curved section of the body that surrounds each wheel, including the visible exterior arch and the inner liner that protects the underside.
What it means
Each wheel sits inside a wheel arch with two distinct surfaces. The outer arch is the painted exterior curve visible from the side of the car, blending into the fender (front) or quarter panel (rear). The inner arch is the cavity above and behind the wheel, often covered with a plastic wheel-liner that catches stones, dirt, and water flung up by the spinning tyre. Both surfaces take damage. The outer arch picks up scrapes from kerb hits and stone chips along its lower edge. The inner arch slowly accumulates road grit, water, and on cars in salt environments, rust starts here. Most modern cars have factory underbody coating along the inner arch and the underside of the body to protect against grit and corrosion. Repair work on the wheel arch ranges from cosmetic spot repair on the outer arch to underbody coating refresh on the inner arch, with full panel replacement only in major-collision scenarios.
Why it matters in Singapore
Singapore's frequent monsoon rain throws grit constantly into the wheel arches at every speed. The inner arch coating wears thin over years, and the lower outer arch is where rocker scrapes show first. Refreshing the underbody coating during a major service or grooming visit is one of the underused ways to extend the life of a daily-driven car here.
How Revol Carz handles this
Revol Carz repairs cosmetic wheel-arch damage as part of spray painting and offers underbody coating refresh on customer request, especially for cars approaching the COE renewal decision.