# International Fleet Body Repair > Steel cab panel replacement and sectioning at factory seams, spot weld restoration, and full corrosion protection rebuild after every cut. Source: https://fleetservicesocrv.com/services/makes-we-service/international-fleet-body-repair Business: Fleet Services OCRV, 23281 E La Palma Ave, Yorba Linda, CA 92887 Phone: (714) 909-1844. Serving Santa Ana, California, about 17 miles from the facility. International body repair centers on galvanized steel cab construction, where panels are joined by resistance spot welds and repaired by sectioning at factory seams. The work includes weld through primer, cavity wax, seam sealer replication, and full corrosion protection restoration on every cut and welded joint. ## Specification - Price range: $750 to $12,000 - Labor hours: 5 to 60 hours - Turnaround: Moderate body - Insurance: commonly billed direct to the carrier ## Symptoms - Rust blistering along the lower door edge or the cab corner - Bubbling paint at the cowl where the windshield flange meets the panel - Fender flange rusted through behind the mounting bolts - Door skin creased from a dock strike with the frame behind still straight - Seam sealer cracked and lifting along a factory joint - Perforation appearing at the bottom of a cab step well ## How is a steel cab panel actually replaced? Steel cab panels are attached with resistance spot welds in a defined pattern, and replacement starts by finding that pattern rather than guessing at it. Welds are located, marked, and drilled or cut with a spot weld cutter sized so the cutter removes the weld nugget without going through the panel underneath. Cutting too deep means repairing the flange you were trying to preserve. Where a full panel is not needed, the panel gets sectioned. Sectioning means cutting the replacement panel and the parent panel at a chosen location and joining them, and the location is not arbitrary. It follows the published body repair procedure for the platform, which specifies where a section is permitted and what joint type is required at that point. The new panel then gets fitted and clamped before anything is welded, because a panel welded in while it is being forced into position carries stress that will show up as a distorted gap later. Fit first, verify gaps against the adjacent panels, then weld in a sequence that spreads heat rather than concentrating it in one area. - Spot weld pattern located and marked before any cutting starts - Weld cutter sized so the nugget comes out without holing the flange - Section locations taken from the published procedure, not from convenience - Panel fitted and clamped, with gaps verified, before welding begins - Weld sequence spread to control heat distortion - Weld count and spacing matched to the factory pattern ## What does corrosion protection restoration involve after cutting steel? This is the step that separates a repair that lasts ten years from one that rusts through in three. Factory steel cabs arrive with an electrodeposited coating on every surface including the inside of closed sections, plus seam sealer at joints and wax in cavities. Cutting and welding destroys all three locally, and none of it comes back on its own. Weld through primer goes on the mating flanges before the panel is clamped, so the area under the weld is protected rather than left as bare steel sealed inside a joint. After welding, the exterior gets cleaned, treated, and coated, and the interior of the closed section gets flooded with cavity wax through the factory access holes or through holes we add and plug. Seam sealer replication finishes it. Factory seams have a specific sealer profile, and a repaired joint that gets a random smear of sealer looks wrong and traps water where the profile is uneven. We reproduce the profile the factory used, which both looks correct and drains correctly. In coastal Orange County air, that drainage detail is what actually keeps the joint alive. - Weld through primer applied to mating flanges before clamping - Exterior weld areas cleaned, treated, and coated after finishing - Cavity wax flooded into closed sections through access holes - Added access holes plugged with proper grommets, not sealer alone - Seam sealer profile reproduced to match the factory pattern - Drain paths verified so water leaves the joint rather than sitting in it ## Where does corrosion actually start on these cabs in coastal air? The cowl area is the leading offender. The windshield flange, the plenum below it, and the drains that are supposed to carry water out of that plenum all sit in one spot, and when the drains block with leaf debris the plenum holds water against the flange. Salt laden air moving inland across Santa Ana does the rest, and the rust works outward until it blisters the paint. Lower door edges are second. Doors have drains at the bottom too, and the same debris problem applies, with the added factor that a door hangs in a car wash spray pattern every week. Once a lower door edge starts, it moves fast, because the closed section behind it holds moisture and there is no airflow to dry it out. Third is anywhere a bracket bolts through the body. Fender flanges, step brackets, and mirror mounts all break the coating locally, and if the fastener was ever removed and reinstalled without resealing, there is now a direct path into the panel. That is why we treat and seal every fastener penetration during reassembly rather than just torquing it back down. ## When do you section a panel instead of replacing the whole thing? Three factors decide it: what the published procedure allows, what the part costs and how fast it arrives, and how much of the panel is actually compromised. If only the bottom six inches of a door skin has perforated and the rest of the panel is sound, sectioning at a permitted location is faster, cheaper, and produces an equivalent result. Where sectioning is the wrong answer is when the damage extends into an area the procedure identifies as structural, when the parent panel has widespread corrosion rather than localized perforation, or when the section joint would land somewhere that concentrates stress. Cutting a corner on section placement produces a joint that cracks, and a cracked joint on a working truck is worse than the original rust. Availability is the practical tiebreaker on older units. A medium duty cab that has been out of production for a while may not have a full replacement panel available at any price, and in that case a properly executed section is not a compromise, it is the repair. We check availability during write up so this is a decision rather than a discovery. - Published procedure consulted for permitted section locations - Extent of corrosion mapped before deciding section versus full panel - Parts availability and lead time checked at write up - Structural areas excluded from sectioning regardless of convenience - Joint type matched to what the location requires - Section joints given full corrosion treatment on both faces ## How is paint handled across a mixed age International fleet? The code lives on the body builder or chassis tag, and pulling it is the starting point rather than the finish. On a fleet where units were bought over eight or ten years, the same code across three trucks will produce three visibly different results because each one has aged differently in Orange County sun and each one has a different history of washing and waxing. The approach that works is to treat every unit individually at the spray out stage. Mix to code, spray a card, compare it against that specific truck in daylight, and adjust. It takes about an hour per unit and it is the difference between a repaired panel that disappears and one that reads as new from across the yard. For fleets that want everything to look the same again, the honest answer is sometimes a full refinish rather than a repair blend. If a unit has faded far enough that the repair panel will never blend cleanly, we say so and price both paths. Deciding that up front is much better than delivering a technically correct repair the fleet manager does not want to look at. ## Questions ### Is rust repair worth doing or should I just run the unit until it dies? It depends on where the rust is and how far it has gone. Localized perforation at a lower door edge or a step well is straightforward to section and treat, and doing it early costs a fraction of what it costs after the closed section behind it has gone. Widespread corrosion across multiple panels on an older unit is a different conversation and we will tell you honestly. ### Will the repaired area rust again? Not if the corrosion protection is rebuilt properly, which is most of the labor on these jobs. Weld through primer goes on the mating flanges before welding, cavity wax floods the closed section afterward, and the seam sealer profile is reproduced so water drains instead of sitting. Skipping any one of those is why some rust repairs come back and others do not. ### How do I know if a panel can be sectioned rather than fully replaced? The published body repair procedure for the platform specifies where sectioning is permitted and what joint type each location requires. We work from that rather than from convenience. On older medium duty units where a full panel may no longer be available, a correctly placed section is often the repair rather than a compromise, and we confirm parts availability at write up. ### What does a steel cab panel job cost? The published band is 750 to 12,000 dollars at five to sixty labor hours. Localized sectioning at a door edge sits low in that range. A full panel replacement with structural involvement, corrosion protection rebuild across several joints, and refinish across adjacent panels runs much higher. The written estimate itemizes labor, parts, and materials before any work starts. ### Why does the cowl area keep rusting on my units? Blocked plenum drains. Debris collects in the plenum under the windshield, the drains stop clearing, and water sits against the windshield flange. Coastal air moving through Santa Ana accelerates it from there. Repairing the rust without clearing and restoring the drain path just resets the clock, so drain function is part of the repair rather than an afterthought. ### Can you match paint across units bought in different years? We match to each individual unit rather than to the code alone. Same code across three trucks of different ages produces three different results because fade and wash history differ. Each unit gets a spray out card compared in daylight against that specific truck. Where fade is too far gone to blend, we say so and price a full refinish as an alternative.