Start from the panel map, not from the machine
Walk the car once before any schedule is written, in one direction, and make a row for every face the routine will touch. Roof and horizontal shoulder, glazed areas, painted body flats, bumpers and other unpainted trim, badges and emblems, decals and printed vinyl, the shut lines around doors, bonnet and tailgate, wheel arches and the lower body band, wheel faces and the inner arch lining. One row per face keeps the row honest: the roof sheds rain but holds dust, while the sill edge is splashed by whatever the tyres throw up, so the two cannot share a line.
Write three things beside each face. The first is the deposit as it actually appears on this car: loose road dust, an oily smear from engine and brake spray, tar spots, tree and insect residue, salt paste in winter, water scale from a sprinkler. The second is the state of that surface, noted before anybody proposes a method for it. The third is how reachable the face is, because a panel that takes a lot of movement to get at will quietly disappear from any routine built around speed.
The condition check comes before the interval check
Panel faces are not uniform, and the state of one face governs whether heat and dwell are legitimate on it at all. Run this list per row, and record what you find rather than assuming the paint is standard:
- repainted panels, resprayed bumpers and body filler areas, where the surface history is unknown to whoever writes the routine
- re-coated or cured aftermarket finishes, wrapping and colour-change film, and the edges of any wrap where a lift has already started
- decals, pinstriping, registration markings and any printed graphic on a body face
- aged or crazed trim, faded unpainted plastic, cracked badging adhesive, and glazing with a failed edge seal
- exhaust areas and anything within reach of the manifold or the exhaust outlet
- the braking surfaces themselves and any bonded structural joint
These are exclusions, not warnings, and each needs a named replacement with the cost of that replacement stated beside it. Where a panel has been repainted to a body shop's process rather than the factory's, hand cleaning with a low-volume rinse is the fallback, and the trade is that the panel takes longer and someone has to inspect it afterwards. Where a decal carries a lifting corner, that face is left out of any heated pass and cleaned by hand instead, at the cost of not lifting the residue under the graphic. Leaving an exclusion out of the written routine does not remove it; it only moves the decision to whoever is holding the wand, under time pressure.
Set the trigger, not the date
A routine that names only a weekday fails the week the weather changes. Write the interval as a state the operator can see: film that hides the colour on a horizontal face, grit along the sill edge, salt paste still present after a mild spell, deposits on the front faces after a motorway run. Then attach a maximum interval as a backstop for the rows nobody complains about, which are usually the roof and the shut lines.
Frequency should be set per group, not per car. Glazing and lights carry a sight-line duty, so their interval is set by visibility rather than appearance. The lower body band, the arches and the wheels carry the heaviest deposit and the hardest residue, so they need a shorter interval than the painted flats. Unpainted trim and badges hold residue at their edges, where a wipe stops at the face and the grime remains in the joint. A single frequency applied to all rows over-cleans the easy faces and leaves the ones that matter.
Choose the mode by water volume and dwell, not by strength
For a body face there are two working choices on this type of plant, and they are not stronger and weaker versions of one another. Dry steam puts in heat and dwell with comparatively little water, which suits vertical faces, shut lines, badges and trim where a running film cannot be rinsed off cleanly and where excess water has nowhere to go. The wetter modes bring the water volume that carries a heavy, gritty deposit away from the surface instead of redistributing it. Choosing by feel is what leaves grit smeared across a painted flat and a finish that looks worse after cleaning than before it.
Two caveats belong beside the figures on any quotation, because they are the ones buyers carry into a specification by mistake. A generator rating is not the same reading as the heat delivered at the nozzle once the hose and the wand are attached. The size of a tank tells you nothing about how long a machine can be worked, since that depends on how much water the operator actually applies. The same caution applies to a site's own water point: whether a joint is available where the cars are parked, and how far the hose has to travel from it, belongs in the routine alongside the mode.
Fix the sequence for each panel group
Order is what stops a clean panel being re-soiled by the next one. The settled pattern for a car body is: a dry stage that removes loose grit before any water touches the paint; a loosening stage with dwell on the row that needs it; a lift and rinse stage; then a dry stage that closes the row so no film is left standing at a shut line or a trim edge. Every wet entry in the routine ends in a dry condition. A face handed back wet is a face that picks up the next film within hours.
Work top to bottom on the body and treat the wheels as a separate stage before the painted flats, because wheel residue contains material that scratches paint. Keep the shut lines, the trim edges and the badging as their own rows rather than as part of the panel they sit in; they are the places where a routine is judged, and they are the places where an unconsidered heated pass does the most damage.
Where the equipment decision actually belongs
Nothing in a panel map asks for a machine by name. What it asks for are rows that the quotation can answer in writing, and those rows are the same whichever model is under discussion: the working voltage against the power actually available where cars are cleaned, how the machine is fed with water and which inlet fitting it needs against the site's tap, the dry and wet mode selection on the machine being quoted, and how the machine moves between the parking position and the work point. For a forecourt or a yard where cars are cleaned outdoors, the published rows of the Fixed Steam Cleaning Machine PowerDe HW02 page record heating power, tank volume and material, working voltage, footprint including handles, the tap-water inlet arrangement and dry and wet steam switching. Those rows are a record for that one unit. They are the starting point for a written request about the machine actually on the quotation, not a portable specification for any other unit.
Where the standard machine layouts do not fit the ground, that is a configuration conversation rather than a compromise on the routine. Enquiries about customized steam cleaning equipment start from the surface list, the exclusions and the utility position, which is the same document the routine is written from. Buyers comparing equipment ranges for a site should expect the difference between machines to be about supply, movement, footprint and mode rather than about which one removes road film faster; a machine cannot outrun a routine that never named the deposit it was sent to remove.
Prove the routine on one car before writing it for the fleet
Mark a test area with tape on a single face that carries the deposit you are worried about, and photograph it in its present condition, with the light coming across the panel so the texture of the film shows rather than the reflection in it. Decide in advance what ends the pass on that face: a graphic lifting or going soft, a change of sheen on a repaired panel, a trim edge rising, moisture getting into a lamp assembly or a shut line. If any of that appears, the row fails, not the trial, and the row goes back to the exclusion list with its replacement named.
Photograph the same face after the pass, and again after the car has been used in normal weather, because a finish that looks clean under a lamp and then holds a film within days has not been cleaned, it has been moved around. Take the cycle time from the second run rather than the first, and use the trial to settle the interval: the point at which the deposit returns to the photographed state is the interval, not the figure anyone wanted to write down.
Keep the routine to one page per panel group
A routine survives when a single sheet is taped in the wash area, with one row per face in the words the site uses for it: who owns it, how often it happens on a state trigger, which method and which mode, and what happens when the result is not accepted. Exclusions stay on the same sheet with their replacement method beside them, so nobody has to invent an answer at the car. Review the sheet on a named date, with the photographs from the trial attached, and re-record the interval if the deposit has come back differently since the trial was done.
