The short answer
Inspect outdoors, in the morning or late afternoon, with the light coming across the panel rather than at it. Raking light casts a shadow off anything that is not flat, which is exactly what you are looking for. Work the unit in a fixed order: structure and seams first, finish second, function third, paperwork last. Signing is the last step, not the first.
Why the shop lighting is not enough
Overhead fluorescent light lands on a panel from directly above and scatters. It flatters. A panel that reads perfect under a bay light can show a shallow wave, a sanding scratch, or a soft edge where clear was pulled thin the moment you take it into the parking lot and drop the sun to twenty degrees off the surface.
This is not a trick and no one is hiding anything. It is the reason painters keep a portable light on a stand and swing it around a panel before they call a job done. You are just repeating a step the shop already ran, from your own angle, on your own time.
If you cannot get outdoors, a phone torch held nearly flat against the body, a foot or so off the surface, does the same job. Move it along the panel and watch the reflection stretch. Anything that is not flat interrupts the stretch.
Start with the seams, not the shine
The finish is the part everyone looks at and the part that matters least structurally. Start where the unit is put together.
- Run a fingertip along every seam in the repaired area. It should feel continuous. A ridge means filler stopped short of a feather edge.
- Check that panel gaps are even end to end. A gap that tapers means something underneath is not sitting where it was.
- Open and close every door, hatch and compartment in the repaired zone. They should latch with the same effort as the ones on the untouched side.
- Look at the sealant beads. A fresh bead should be continuous, tooled, and the same width along its run. Skips and thin spots are where the next leak starts.
Doors are the most useful single tell on a structural repair. A door that needs a shoulder to close, or that latches at the top before the bottom, is telling you the opening is not square. That is worth raising before you sign, because it is far easier to address while the file is open. Our page on structural damage assessment covers what squareness actually gets measured against.
Then read the finish
Now the paint, with the light low.
Look down the length of the panel rather than straight at it. You are checking for three things. Waves, which read as a rippling reflection. Texture mismatch, where the repaired area has finer or coarser orange peel than the panel next to it. And dieback at the edges, where a blend was not carried far enough and the transition is visible as a faint line.
Colour match deserves its own pass. Stand back eight to ten feet, then walk a slow arc around the repair. Metallics and pearls shift with viewing angle, and a match that looks perfect head on can go light or dark at forty five degrees. This is normal to check and normal to raise. Anyone doing blend and spot refinish work expects the question.
On a unit with decals or graphics, check that the reapplied sections line up across a seam or a door gap. A hinged door that hangs a sixteenth of an inch low will step a stripe visibly, and it is easier to see in a photograph than in person. Take one.
Function before paperwork
If the job touched anything that moves or carries current, run it.
Extend and retract a slide through its full travel and watch the seal roll rather than drag. Cycle an awning out and back in. Run a roof air through a cooling cycle long enough to hear it stage. Put a load on the electrical system rather than just confirming a light comes on. A twelve volt circuit that reads correct at rest can still fail under draw.
Water is the one nobody wants to test at delivery and the one most worth testing. If the work involved a roof, a window, a slide or a seam, ask for a hose test before you leave. Water finds a path in minutes that a visual inspection will not find in a season, and finding it in the yard is enormously cheaper than finding it on the I-15 somewhere north of Limonite Avenue.
Read the invoice against the estimate
Set the two documents side by side. The invoice should account for every line on the estimate plus every line on any supplement, and the labor hours should be recognisable. A line that appeared without a supplement behind it is worth a question. So is a line that disappeared.
Confirm what was replaced versus repaired, and confirm the part type on anything replaced. On a specialty unit this frequently matters more than it does on a car, because a discontinued component may have been fabricated rather than sourced, and that is a different thing to have on record. Our notes on parts and materials explain how the markup and sourcing work.
If a claim funded the work, keep the estimate, every supplement, the invoice and your photographs together. That set is what answers a question two years from now when a buyer asks what happened to the sidewall.
What to do if something is off
Say it in the yard, calmly, before signing. Almost everything on this list is a short conversation when the unit is still on site and a much longer one after it has left.
Take photographs while you are standing there, in the same raking light, with something in frame for scale. A photograph of a wave taken with the sun across the panel is self explanatory. The same wave photographed at noon is invisible and unarguable.
None of this implies bad faith. A shop wants a delivery walk that finds nothing, and a shop that has done the work properly is not nervous about a customer with a torch. The walk exists because the alternative is discovering something six months later, when the record has gone cold and the fix has stopped being simple. If you want the scope written properly from the start, that begins at intake rather than delivery, which is what the request a quote form is for.