# Cab and Chassis Respray > Coordinated refinish of cab, sleeper, and frame rails on tractors and chassis cabs, including chassis coating. Source: https://fleetservicesocrv.com/services/paint-and-refinishing/cab-and-chassis-respray 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. A cab and chassis respray refinishes the cab exterior, sleeper, doors, and the frame rails and crossmembers underneath as one coordinated job. It is how a high mileage tractor or a chassis cab returns to presentable and corrosion resistant condition without replacing sheet metal or pulling the unit apart. ## Specification - Price range: $1,200 to $9,500 - Labor hours: 8 to 45 hours - Turnaround: Full refinish - Insurance: typically customer pay or fleet account ## Symptoms - Frame rails with flaking coating and surface scale - Chalked cab paint that no longer responds to polishing - Peeling clear on the roof and hood of a sleeper cab - Corrosion staining running down from crossmember brackets - Cab color visibly out of standard against newer units in the fleet - Paint failure at door bottoms and step wells ## Why does a chassis need a different coating than the cab does? The cab is a visibility surface and gets a full base and clear system, because gloss retention and color match to the rest of the fleet are the whole point of spraying it. The chassis is a durability surface. Nobody grades a frame rail on gloss, but everybody notices when it is scaling and staining down the side of the tank. Frame work gets a direct to metal coating, typically a two component epoxy or a high solids urethane chassis enamel, applied heavier than a body finish and usually single stage. Single stage on a chassis is the correct choice rather than a cost cut. Fewer layers means fewer interfaces to fail when the frame flexes and takes grit at speed. Crossmembers, brackets, tank straps, and the inside faces of the rails are where corrosion actually starts, because those are the surfaces that hold water after a wash. Those get coated before the outer faces, so nothing is left uncoated because access closed up later in the sequence. - Cab in base and clear for gloss retention and fleet color match - Frame rails in single stage high solids urethane or two component epoxy - Direct to metal primer anywhere the surface was taken to bare steel - Inside rail faces, crossmembers, and brackets coated before outer faces - Heavier film build on chassis surfaces than on body panels - Seams and lap joints sealed before coating goes on ## What is involved in prepping a frame that has been on the road six years? Six years of Southern California freeway leaves a frame carrying road film, brake dust, salt off the coastal air, and in most cases a layer of oil residue. Coating over any of that is throwing material away. Preparation on a chassis is most of the labor on the job and it is the part that decides whether the coating lasts two years or ten. The frame gets degreased with an emulsifying cleaner, rinsed, and force dried, then loose scale is removed mechanically. Anything taken down to bare steel gets an epoxy or self etching primer the same day, because flash rust forms on clean steel within hours in Santa Ana humidity and primes over rust do not hold. Pitted areas that have already lost section are a structural conversation rather than a paint conversation. We point those out and quote the repair separately rather than coating over metal that is going to need cutting and plating in two years anyway. Coating hides a problem for exactly as long as it takes to matter. - Degrease with emulsifying cleaner, rinse, and force dry - Mechanical removal of loose scale and flaking coating - Same day primer on bare steel to beat flash rust - Seam sealer at lap joints and bracket edges - Masking of brake components, air lines, and wiring runs - Pitted or section loss areas flagged for separate structural repair ## How does a cab respray differ from painting a car sized panel? Scale is the whole difference. A tractor cab with a sleeper presents roughly four times the surface of a passenger car and the panels are much flatter, which is unforgiving. Flat panels show every ripple in the substrate and every variation in film build, so block sanding time on a cab runs far longer than the panel count suggests it should. Height is the second difference. The roof of a sleeper cab sits above head height, which means lift work inside the booth and a spray angle that fights the operator the whole way across the panel. Booth size and ceiling height are the constraints that keep most shops out of this work entirely. The third is fittings. Air horns, marker light rows, fairings, mirror arms, bezels, grab handles, and deflectors. Every one of those comes off and goes back on, and every one is a place where masking instead of removing leaves a ridge that starts lifting within a year of pressure washing. ## When does a Santa Ana fleet respray a cab instead of replacing the unit? The math usually favors respray when the frame and body structure are sound and the finish is the only thing that is spent. Cab and chassis work runs one thousand two hundred to nine thousand five hundred dollars at eight to forty five labor hours. That is a fraction of unit replacement and it buys most of a decade of presentable service. It stops favoring respray when corrosion has taken section out of the cab floor, the door bottoms, or the rails. At that point the sheet metal work is the actual job and the paint is incidental to it, and the numbers need running against replacement honestly rather than optimistically. Santa Ana operators running owner branded tractors also weigh the brand argument. A tractor pulling into a customer yard with a chalked cab and a scaling frame says something about the operation before the driver has the door open, and no wash recovers that impression. ## How is the work sequenced so the unit is not in pieces for a month? Chassis first, cab second is the usual order, because chassis work is dirty and overspray risk runs downhill onto anything already finished. The frame is cleaned, primed, and coated, then the unit is masked off at the frame line and the cab is prepped, sprayed, and baked as a separate stage. Removable items come off during chassis cure and get sprayed separately on racks, so bumper, fairings, and mirror arms are drying while the cab is still in prep rather than adding days at the end. Reassembly is the last two days of the job and it is where a rushed schedule shows up first. Total calendar is two to five weeks. Most of that is cure windows and reassembly rather than time under the gun. We schedule against a fleet's slow week where we can, and we take one unit at a time from a given account unless the fleet manager tells us to run two in parallel. - Chassis cleaned, primed, and coated first so overspray moves away from finished panels - Removable trim, fairings, and mirror arms sprayed separately on racks - Cab masked at the frame line before body prep begins - Block sanding on flat cab panels before any color goes on - Base and clear with a full bake cycle on the cab - Reassembly with new fasteners and seals where the originals are spent ## What should a fleet expect to find once the cab comes apart? Teardown finds things. Corrosion behind mirror brackets, a cracked step bracket, seals that have turned to powder, fastener holes that have elongated. None of it is unusual on a unit past six years and none of it is visible with the trim in place, which is why a respray estimate carries a supplement conversation with it. We photograph what comes to light, price it, and call before doing any of it. Nothing gets added to the invoice without a fleet manager saying yes. What we will not do is coat over corrosion behind a bracket and hand the unit back looking finished, because that failure surfaces again in about eighteen months. Budgeting ten to fifteen percent above the base estimate on a unit past six years covers the common finds. On a tractor that has run coastal routes its whole life, budget more, because salt exposure at the bracket and seam level is consistently worse than the outside of the unit suggests it will be. - Corrosion behind mirror brackets, grab handles, and step mounts - Cracked or fatigued brackets found under trim - Perished seals and gaskets needing replacement at reassembly - Elongated or stripped fastener holes needing repair - Previous body filler discovered during sanding - Photographs and pricing supplied before any added work begins ## Questions ### Can you paint the frame without taking the truck apart? Yes. Frame coating is done with the unit assembled, with brake components, air lines, and wiring runs masked off. What we cannot do is coat surfaces that are physically unreachable with the body in place, and we tell you which those are up front rather than charging for coverage that does not exist on the unit. ### How long is a tractor out of service for a cab respray? Two to five weeks at eight to forty five labor hours for the cab and chassis work together. The spread depends on how much scale has to come off the frame and whether the cab needs body work before paint. Most of the calendar is cure windows and reassembly rather than time under the gun. ### Do you match the cab to the rest of our fleet color? Yes, and on a respray that is easier than on a panel repair, because the whole cab goes on at once from one mix. We read a current fleet unit rather than working from the code alone, so the resprayed tractor lands where the fleet is now rather than where the trucks were when they were new. ### Will the chassis coating hold up to steam cleaning? A properly prepared two component chassis coating handles routine steam and pressure cleaning once fully cured. Cure is the operative word, so give it thirty days before steam. The failures we see come from coating applied over grease that was never fully emulsified during prep, not from the cleaning itself. ### Can you respray just the sleeper or just the hood? Yes, and a tractor has natural boundaries that make partial work viable, since hood, cab, and sleeper are separate assemblies. The consideration is that a fresh hood next to a nine year old cab will read as newer for the first year. Blending helps at the boundary but does not fix a whole panel age difference. ### Do you do the fuel tanks and the fairings? Tanks and fairings are normally separate items on the estimate and get sprayed off the unit on racks. Aluminum tanks need different prep and primer than steel does, and polished tanks are usually left polished rather than coated. We scope each of those explicitly so the estimate reflects what is actually being sprayed.