# Panel Replacement and Sectioning > Full and partial panel replacement using approved sectioning points, correct weld type and restored corrosion protection. Source: https://fleetservicesocrv.com/services/collision-and-structural/panel-replacement-and-sectioning 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. Panel replacement and sectioning removes damaged sheet metal or composite and installs new material either as a complete panel or as a partial section joined at a manufacturer approved location. Attachment follows the original construction method, using resistance spot welds, MIG welds, structural adhesive, rivet bonding or a combination of the three. ## Specification - Price range: $750 to $12,000 - Labor hours: 5 to 60 hours - Turnaround: Moderate body - Insurance: commonly billed direct to the carrier ## Symptoms - Torn, creased or stretched metal that will not pull back to contour - Rust perforation at the base of a panel or along a seam - Panel that has been repaired before and now shows filler cracking - Gaps that cannot be corrected by hinge or bracket adjustment - Split or separated spot welds along a flange - Dents crossing a body line or reinforcement ## When is a panel replaced instead of repaired? The deciding factor is whether the material can return to its original shape without losing strength. Sheet metal stretches when it is struck, and a repair works by shrinking that stretch back out. Beyond a certain point the metal has thinned, work hardened or torn, and no amount of pulling and filling produces a panel that holds shape over the next three years of service. Cost crosses over as well. A door skin that needs 9 hours of metal finishing to reach a paintable surface is more expensive than a replacement skin bonded and welded in 5 hours. The estimate compares those paths honestly rather than defaulting to whichever one has better margin, and the labor bands are printed on the page. Material type shifts the answer. Aluminum panels have far less tolerance for repeated working than mild steel and generally get replaced at a lower damage threshold. High strength steel used in cab structures often cannot be repaired at all under manufacturer procedures, because straightening changes the grain structure that gave it its rating. - Stretched, torn or work hardened metal past shrinking limits - Repair labor exceeding replacement labor on the same panel - Aluminum skins damaged beyond a single working cycle - High strength steel where the procedure prohibits straightening - Corrosion perforation at the damaged area - Damage crossing a structural seam or a spot weld flange ## What is sectioning and where is it allowed? Sectioning means replacing part of a panel rather than the whole thing. A rocker damaged in its rear 18 inches can be cut and joined to a new section instead of replacing the full length, which avoids disturbing the A pillar and the front hinge structure. Done correctly it saves substantial labor with no loss of strength. Location is not a matter of convenience. Manufacturers publish approved sectioning points chosen because they sit in low stress areas away from crush zones, mounting hardware and reinforcement transitions. A splice moved four inches to make the cut easier puts the joint where the engineer specifically decided a joint should not be, and the panel will eventually tell you about it. Joint construction follows the published procedure as well. Depending on the location that means an offset butt joint with a backer, a lap joint with plug welds at set spacing, or an insert with structural adhesive plus rivets. Each has a defined overlap, weld count and sealer treatment, and the file records which one was used so the next shop knows what it is looking at. ## How are panels attached on modern commercial bodies? Resistance spot welding reproduces the factory joint on steel panels where the flange is accessible from both sides. A squeeze type spot welder makes a weld nugget with a controlled heat affected zone, which matters because a MIG plug weld dumps far more heat into the surrounding metal and warps large flat panels. Structural adhesive has become standard on many joints, either alone or combined with welds or rivets. Two part epoxy adhesives develop full strength over a defined cure window, typically several hours at shop temperature or faster with controlled heat, and they seal the joint against moisture at the same time. Clamp pressure and open time both have to be respected or the bond line is compromised. Rivet bonding is the common answer on aluminum and mixed material panels. Self piercing rivets or blind rivets set at published spacing carry the mechanical load while the adhesive carries shear and seals the seam. Steel fasteners in aluminum need isolation or the joint corrodes galvanically, which is why fastener material is specified rather than assumed. Process choice is recorded on the repair order along with the location. A future shop looking at that seam needs to know whether it is dealing with spot welds, plug welds, adhesive or a rivet bonded joint, because each one comes apart differently. Fleets that keep those records with the unit history save real diagnostic time the next time a panel in that area takes a hit. - Squeeze type resistance spot welds reproducing the factory nugget pattern - MIG plug and stitch welds where two sided access is not available - Two part structural epoxy with controlled clamp pressure and cure time - Self piercing and blind rivets at published spacing on aluminum - Weld through primer at every mating flange - Isolators between dissimilar metals to prevent galvanic corrosion ## How is corrosion protection restored after panel work? Every cut, grind and weld destroys the factory coating on both sides of the metal. Restoring it is not optional on a unit that lives in coastal Orange County, and it is the step most often shortened when a job is running behind. Bare metal gets cleaned, etched or treated, then coated with epoxy primer before any filler or sealer touches it. Interior surfaces need attention that is easy to skip because nobody can see it. Boxed sections and pillars get cavity wax injected through existing drain or access holes so the inside of the section is coated. On a panel that was welded, the backside of the weld gets primed before the assembly closes up, since there is no way back in afterward. Seam sealer goes on last, reproducing the factory bead profile rather than a generic smear. Factory beads have a specific width and shape because they are doing a job, and a Santa Ana fleet manager looking at a repaired seam should not be able to tell where the original ends and the repair begins. Sealer is then topcoated so it does not degrade under sunlight. ## What does panel work cost and how long does it take? Panel replacement and sectioning runs 5 to 60 labor hours with published ranges from 750 dollars to 12,000 dollars. A single bolt on fender lands near the bottom. A welded quarter section on a cab, with associated blending, corrosion protection and graphics reproduction, lands considerably higher. Adhesive cure time is real calendar time and gets scheduled rather than rushed. Moderate body turnaround applies, generally four to eight business days. Bolt on panels can move faster. Welded and bonded panels are governed by cure windows and refinish schedules, and forcing a bonded joint into service before full cure is how a panel comes back in three months with a bond line failure at the corner. Fleet units carry a fourth consideration that private vehicles do not. Graphics, unit numbering and regulatory lettering on a replaced panel have to be reproduced. That reproduction is quoted with the panel rather than as a surprise, and it is ordered early so a finished unit is not parked in the yard waiting on vinyl. ## Questions ### Can you replace just the lower half of a rusted panel? Yes, when the manufacturer permits a section at that location and the metal above the cut is sound. The panel is cut at the approved line, a replacement section is fitted with the specified joint, and both sides are corrosion protected before closing up. Sectioning a panel where no approved location exists is not something the shop does. ### How do you match paint on a single replaced panel? The color is read with a spectrophotometer, mixed, sprayed on a test card and compared under shop and daylight conditions before anything reaches the vehicle. Adjacent panels are blended so the transition is not visible at an edge. Fleet colors that have faded over several years get matched to the current condition of the unit, not to the original code. ### Is a bonded panel as strong as a welded one? In the locations where manufacturers specify bonding, yes. Structural adhesive distributes load across the full bond line instead of concentrating it at weld points, and it seals the joint at the same time. The requirement is that the specified adhesive, clamp pressure, overlap and cure schedule are all followed rather than approximated. ### Do you use aftermarket panels or original parts? Both, and the estimate names which one is being used on each line. Carriers frequently specify aftermarket or reconditioned parts on older units. Where an aftermarket panel has fit or gauge problems that would compromise the repair, that gets documented and raised before installation instead of after the panel is on the vehicle. ### Will the repaired panel rust before the rest of the truck? Not when the coating sequence is done properly. The weak point on any panel repair is bare metal left inside a closed section or behind a weld. Interior surfaces get primed before closure and boxed areas get cavity wax, which is why the process order matters more than the product brand on the shelf. ### How many panels can you do at once on a Santa Ana fleet unit? Multi panel jobs are routine and are usually more efficient than staged single panel visits, since the unit is masked, prepped and booked into the booth once instead of three times. Fleets that batch panel work during a slower delivery week get better pricing per panel and one block of downtime instead of several.