Auto rust repair in Markham — done in steel, not bondo.
Ontario winters are punishing. Road salt eats rocker panels, cab corners, jack points, and frame rails from the inside out. We fix rust the way it should be fixed — by cutting it out and welding in fabricated steel.
The metal-first difference
Why real rust repair matters
Rust doesn't stop when you paint over it. It doesn't stop when you fill it with body filler. Corrosion is a chemical process — as long as any rusted metal is left in the panel, moisture and oxygen will keep the reaction going, spreading it further under the paint. A cosmetic patch might look good for six months. The rust underneath keeps eating.
At Islas Restoration, we treat rust the way a good surgeon treats an infection: we remove all of it. Every rusted section of metal is cut out — cleanly, back to healthy, structurally sound steel — and replaced with a fabricated patch panel that we shape, fit, and weld into place. Then the seams are sealed, the cavities waxed, and the panel refinished so it looks factory.
That's the difference between a rust repair that lasts a season and one that lasts a decade.
Common rust problems on Ontario vehicles
- Rocker panels rotted from the inside out
- Cab corners bubbling through the paint
- Rusted jack points that can't safely lift the vehicle
- Frame rails with structural corrosion
- Quarter panels with rust bubbles above the wheel arch
- Wheel wells eaten through from salt spray
- Truck bed floors and bedsides
- Floor pans and subframe mounts
Our process, step by step
- 01
Full inspection and photo report
We inspect the vehicle fully, mark corroded areas, and show you exactly what needs to go and what doesn't. Nothing is hidden.
- 02
Cut back to solid steel
Using cut-off wheels, plasma cutters, and spot-weld drills where appropriate, we remove every trace of rust — including under the paint line — until we reach clean base metal.
- 03
Fabricate the patch panel
We shape a patch in fresh steel to match the original panel's contour, gauge, and geometry. For visible body panels, this includes bead-rolled character lines and English-wheel work so the panel reads factory.
- 04
MIG weld, grind, and prime
The patch is stitch-welded into place with weld-through primer, ground flush, and coated to prevent flash rust before finishing.
- 05
Seal cavities and refinish
Cavity wax is injected into enclosed sections, seam sealer applied where the factory did, then epoxy primer, base coat, and clear coat to match the vehicle.
When to repair rust — and when it's too late
Small blisters and pinholes are easy: catch them early and the repair is quick, contained, and affordable. Once corrosion has reached the structural side of a rocker panel, cab corner, or frame rail, the repair grows. Waiting a winter doubles the affected area. Waiting two winters can turn a contained job into a full section rebuild — or, in the worst cases, into a vehicle that can't safely pass a Motor Vehicle Inspection.
Our advice: if you can see bubbles or a spot where paint is lifting, get it looked at before spring turns to summer. Send us photos through the estimate form and we'll tell you honestly whether it's something to jump on now or monitor.
What determines the cost
- Extent of corrosion (surface vs structural)
- Panel accessibility and vehicle model
- Whether refinishing is required
- Cavity sealing and undercoating
- Factory vs fabricated replacement
- Colour match complexity
Frequently asked
- How much does rust repair cost in Ontario?
- Small surface repairs typically start around $400–$800. Structural rust — rocker panels, cab corners, jack points, frame rails — starts higher because it requires fabrication and welding. Every quote is itemized and photo-documented.
- Will rust repair pass Ontario safety inspection?
- Yes. Our structural repairs are welded to Ontario Motor Vehicle Inspection Standards and can be verified by any licensed inspector.
- Can you just weld over the rust to save money?
- No. Welding over rusted metal traps corrosion inside the seam and fails within a season. We cut back to solid steel every time — it's the only way the repair lasts.
- Do you offer any warranty on rust repair?
- Yes. All structural welded repairs carry a workmanship warranty. We'll walk you through the specifics when we quote your vehicle.