Painted brake rotors need the rust cleaned off the rotor hat, a KBS Klean and RustBlast prep, and a coat of XTC Zinc Rich Primer under XTC High Temperature Coating to stop the rust from coming back through open or custom wheels. The KBS Rotor Restoration Kit packages everything needed for the job, enough for 4 or more standard car rotors, in one box.
Updated September 2026 by the KBS Coatings technical team.
| Kit | Rotor Restoration Kit (KBS Klean, RustBlast, XTC Primer, XTC, gloves) |
|---|---|
| Application temperature | 55 to 82 degrees F |
| Recoat time (aerosol) | 15 minutes between coats of the same product, 30 minutes from primer to topcoat |
| Cure | 350 degrees F for 20 minutes (BBQ or oven), or 12 hours ambient plus driving to heat cycle naturally |
Why Paint Brake Rotors
Rusty rotor hats show through open and custom wheels and make an otherwise clean car or truck look neglected. Painting the rotor hat with a heat rated coating stops that surface rust from coming back and costs far less than replacing rotors that are still mechanically sound; painting a set of new rotors before they ever rust is just as effective as restoring old ones.
How to Prep Rotor Hats for Paint
Prepping a rotor hat for paint means stripping loose rust, degreasing with KBS Klean, and etching with RustBlast so the coating has a clean surface to grip. The job can be done with the rotor still on the vehicle; only sandblasting requires pulling the rotor and caliper.
- Remove loose or flaking rust from the rotor hat with sandpaper or a wire wheel, being careful not to gouge or scratch the friction surface. It is not necessary to reach bare metal everywhere; RustBlast handles what is left.
- Degrease with KBS Klean. KBS Klean is a water based, non-toxic, biodegradable cleaner that works as well as traditional brake cleaner without the harsh fumes. Mix with water and scrub with a brush to remove dirt, grime, and brake dust.
- Etch with RustBlast. RustBlast dissolves remaining rust and micro etches the metal so paint can grab onto the surface, then leaves behind a zinc phosphate coating that resists flash rusting. Spray or brush it on, scrub with a pad, and re-wet the surface as needed so it never dries before rinsing.
Masking the Rotor Before Painting
Mask the friction surface of the rotor before painting so coating cannot interfere with contact between the rotor and the brake pads, which can affect braking and damage the pads. Cover the friction surface, the brake caliper, and the wheel studs with masking tape; if the friction surface does get overspray, the brake pads burn the coating off that one contact area the first couple of times the vehicle is driven.
Priming and Coating Rotor Hats with XTC
Prime and coat rotor hats with XTC Zinc Rich Primer followed by XTC High Temperature Coating, both rated for the heat a rotor sees in service. It is not necessary to remove every trace of rust before coating; XTC Primer bonds to and permanently seals any remaining flash rust.
Shake the XTC Primer aerosol can vigorously for one minute once the mixing ball rattles freely, then hold the can 12 to 15 inches from the surface and apply two thin, covering coats, allowing 15 minutes drying time between coats. Allow the primed surface to dry a minimum of 30 minutes before top coating. Apply the XTC aerosol the same way, in at least two thin coats with at least 15 minutes between coats, and remove the masking tape 30 minutes after the last coat. Apply both products between 55 and 82 degrees F, ideally out of direct sun.
How to Heat Cure XTC on Brake Rotors
XTC and XTC Zinc Rich Primer reach full hardness and maximum adhesion only after a heat cure, and rotors can be cured two ways: in a BBQ grill or oven, or by reinstalling them and driving. For the oven or grill method, place the rotors on aluminum foil to keep them clean and heat to 350 degrees F for 20 minutes.
To cure on the vehicle, let the coating cure in ambient temperature for 12 hours, then reinstall the rotors and drive the vehicle a few times, braking normally, so the rotors heat up and come back down to room temperature naturally. Avoid deep puddles the first couple of drives; rapidly cooling a hot rotor in water can affect the cure.
What You Need
- Rotor Restoration Kit: bundles KBS Klean, RustBlast, XTC Zinc Rich Primer, XTC, and gloves, sized for 4 or more standard car rotors.
- KBS Klean: degreases the rotor hat before and after rust removal.
- RustBlast: dissolves rust and etches the surface for adhesion.
- XTC Zinc Rich Primer: corrosion protection under the topcoat.
- XTC High Temperature Coating: the heat rated topcoat, available in 10 colors.
- Masking tape and a wire wheel or sandpaper, plus chemical-resistant gloves and safety glasses.
Stuck or unsure? Search the KBS Support Desk for instant answers
Frequently Asked Questions About Painting Brake Rotors
What paint to use on brake rotors?
Use a high temperature coating rated for brake heat on the rotor hat and edges, never on the friction surface. The KBS Rotor Restoration Kit pairs XTC Zinc Rich Primer with XTC High Temperature Coating, both rated for rotor operating temperatures, in an aerosol kit sized for 4 or more standard car rotors.
Is it okay to paint brake rotors?
Yes, as long as the friction surface where the brake pads clamp down is masked off or left uncoated. Painting the rotor hat and edges is purely cosmetic and does not affect braking; any overspray that reaches the friction surface burns off the first few times the vehicle is driven.
Can I spray paint brake rotors?
Yes, XTC Zinc Rich Primer and XTC High Temperature Coating both come in aerosol cans made for this job. Shake the can until the mixing ball rattles freely, hold it 12 to 15 inches from the surface, and apply light, even coats rather than one heavy pass.
Are painted brake rotors worth it?
Yes, for appearance and rust prevention behind open or custom wheels. A properly primed and coated rotor hat resists the surface rust that shows through wheel spokes, and it costs far less than replacing rotors that are still mechanically sound.
Still have questions? Search the KBS Support Desk for instant answers
A Rotor Restoration That Lasts
Brake rotors have a big impact on how a set of wheels looks. Clean the rotor hat, degrease and etch it, mask the friction surface, then prime and coat with XTC, and the finish will resist the rust that keeps showing through custom wheels, at a fraction of the cost of new rotors.
Related guides: Do You Need Primer for High-Temp Paint?, or browse all KBS application guides.
Tagged Products
