Repainting 22 Trucks One at a Time Over 19 Weeks

A body shop with capacity likes batches. Setup is shared, masking materials get used efficiently, the booth runs continuously, and the labor per unit drops slightly. All of that is real and all of it benefits the shop more than the customer. On the customer side, six trucks down simultaneously means six route days lost per calendar day of the batch.

Using the downtime arithmetic that applies to this class of unit, somewhere between $400 and $1,500 per unit per day, a six unit batch that occupies eight working days generates 48 unit days of downtime. At even $600 per unit day that is $28,800 of downtime cost to save perhaps $4,000 of labor efficiency. The batch is not cheaper. It just looks cheaper on the invoice, which is the only document most people compare.

One unit at a time inverts that. Nineteen weeks of elapsed calendar, but the fleet never loses more than a single truck, and on most days it loses nothing because the unit in the shop is the one that would have been the spare anyway. Total downtime cost across the whole program lands near 22 unit days rather than 48 or more.

Each truck required four working days: one day of teardown and prep including graphics removal, one day of body correction and priming, one day in the booth and cure, and one day of reassembly, graphics application and cut and buff. That is a straightforward schedule for a 24 foot box with a cab in a matching color.

Four working days per unit across 22 units is 88 working days, which is roughly 18 calendar weeks at five days a week with no gaps. We planned 19 weeks to absorb two holiday weeks and one buffer week, and we intook on Monday and delivered on Thursday so each unit missed one route week rather than straddling two.

Two units needed more than four days because prep revealed corrosion at panel cut edges from previous repairs, and those got pulled out of sequence and handled with the buffer week rather than pushing the whole program back. That is the value of building slack in: a discovery on unit nine does not move unit twenty two.

Color drift across a long program has three sources: paint batch variation, application variation between painters and days, and substrate variation between trucks. All three are controllable and all three have to be addressed or the last truck does not match the first.

Batch first. We ordered the base coat for the entire program in a single production batch where the volume allowed, which removes the largest single variable. Where a second batch was needed, it was tinted against a sprayout card made from the first batch rather than against the formula, because a formula reproduces a number and a sprayout card reproduces an appearance.

Then application control. One sprayout card sprayed at program start became the reference, and every unit got a card sprayed at the same gun settings before the truck went in. That card was compared to the master under corrected lighting, and if it did not match, the gun setup or the reducer choice got adjusted before any paint touched the truck. Ambient temperature swings across nineteen weeks change flash times and therefore metallic orientation, which is why the reducer changes seasonally and the card catches it.

The graphics carry as much brand recognition as the base color, and printed vinyl varies between print runs the same way paint varies between batches. Print all 22 sets at once from one run on one media lot. Store them flat and out of light. A set printed in month five will not match a set printed in month one closely enough for two trucks side by side.

Removal of the old graphics is real labor and it is the part that gets underestimated. Vinyl that has been on a truck for six years in southern California sun has lost plasticizer and comes off in fragments, and the adhesive residue requires heat and chemical removal without damaging the substrate you are about to paint. Budget it honestly or it eats the schedule.

Application sequence matters on a program like this. We applied graphics after cut and buff rather than before, because polishing compound near a vinyl edge is how edges lift six months later. And we photographed the placement of every element on unit one with measurements from fixed reference points, so unit 22 had the logo in the same place rather than in approximately the same place.

Eleven of the 22 units had corrosion at cut edges from previous repairs where a panel had been cut and the edge left unsealed. That is the most common finding on any fleet with a repair history, and it is why a repaint program should include a corrosion inspection rather than assuming a scuff and shoot. Painting over an unsealed cut edge produces a blister within eighteen months and undoes the whole program.

Four had rear sill damage from daily loading with coating worn through to bare steel. Those got the sill treated and a bolt on protector added, which is inexpensive and prevents the same condition returning before the paint does. Three had lower rear corner damage consistent with dock contact, repaired properly rather than filled.

Two had roof seam sealant that had cracked and let water into the box, which is a different conversation and got handled as separate authorized work rather than absorbed into the paint program. Box body repair runs $750 to $15,000, and finding those two during prep was worth more to the customer than the paint was, because both were producing cargo damage claims nobody had connected to the roof.