Food Truck Washing: Grease, Soot and Catering Van Care

Food truck washing is a different job from washing a box truck that happens to carry food. A mobile kitchen vents cooking grease out of the roof, runs a generator that puts soot on the rear panels and serves customers through a window that collects drips, fingerprints and spilled sauce all shift. Catering vans have their own version of the problem: rear doors and floors that see sauce pans, ice chests and wet carts every day.

Mid-October is a good moment to look at this. The City of Douglasville listed its 2026 Restaurant Week for October 12 to 16, run by Main Street Douglasville with 16 participating restaurants, and many local kitchens now run a truck, a catering van or both for events and deliveries. As the holiday catering season builds, those vehicles are on show at office parties, school events and private functions, and a greasy roofline or a soot-streaked tailgate says something about the kitchen it came from.

This post covers where food trucks and catering vans get dirty, what chemistry and pressure to use, how to protect wraps and equipment, and how often to wash.

Where Food Trucks Actually Get Dirty

The roof is the worst area and the one least often cleaned. The exhaust hood fan pushes grease-laden vapor out through a roof vent, and some of it settles back on the roof, the front cap and the upper sides. Over a few weeks it becomes a sticky amber film that traps dust and pollen and runs down the sides in streaks after rain.

The rear and curb side take the next hit. A generator mounted on the back or in a side compartment leaves a gray soot pattern around its exhaust outlet, and the serving side collects spills below the window, on the counter ledge and on the step. The lower panels pick up the usual road film and red clay splash on the way to every event.

Catering vans are simpler on the outside but harder inside. Floors, door sills and cargo walls collect spilled food and liquid, and residue left in seams and tie-down tracks is what turns into a smell in a warm van.

Cutting Kitchen Grease on the Roof and Upper Body

Cooking grease does not come off with a quick rinse. It needs an alkaline degreaser applied to a dry surface, given a dwell of 3 to 5 minutes, and kept wet so it does not dry on the panel. On heavy buildup around the vent, a soft brush on a pole loosens the film so the rinse can carry it away.

Warm water helps a great deal. Grease releases far more easily at 120 to 140 degrees Fahrenheit than with cold water, and hot water reduces the amount of chemical needed. Rinse at a moderate 1,200 to 1,500 PSI with a wide 25 or 40 degree tip, working from the top down so the grease does not run over panels that are already clean.

Keep the spray off the vent opening and the fan housing itself. Those are cleaned from inside as part of the kitchen's hood cleaning schedule, and forcing water into them from outside can soak filters and wiring.

Generator Soot, Service Windows and Steps

Generator soot is carbon bound in a light oily film. A degreaser loosens it, but the panel around the exhaust outlet usually needs gentle hand agitation with a soft mitt before the rinse. Shut the generator down and let the exhaust cool before anyone washes near it, and keep water out of the generator's air intake and electrical panel.

The service window, counter ledge and awning need hand work rather than pressure. Close and latch the window, wipe the seals, and clean the ledge with a food-safe cleaner. Food residue on the outside of the serving area is the part customers see from two feet away.

Steps, grab handles and the area under the window are slip hazards when grease is left on them. Degrease them every wash, rinse thoroughly and let them dry before the truck is loaded.

Protecting Wraps, Seals and Equipment

Most food trucks are fully wrapped, and the wrap is the menu, the logo and the phone number. Keep the nozzle at least 12 inches from vinyl, stay at the moderate pressure range above, and never aim the spray at a seam or an edge. Strong solvents and very high pH products can lift edges and dull printed film, so check that the degreaser is approved for vinyl before it goes on the sides.

Cover or avoid the electrical inlet for shore power, propane fittings, the gray and fresh water fill points and any exterior lighting connectors. Water forced into a shore power inlet is a real problem on the next hookup.

If you only have one rule, make it this: the roof and sides can take a commercial wash, but anything that is part of the kitchen, the gas system or the electrical system is cleaned by hand or not at all.

Catering Van Interiors and Cargo Areas

Catering vans carry food in pans, carriers and coolers, and spills happen on every route. Clear the cargo area, sweep out loose debris, then clean floors, walls and tie-down tracks with a cleaner suited to food residue. Pay attention to the seams where the floor meets the walls, the rear door sill and the step, because that is where residue sits and sours.

Let the cargo area dry fully before it is loaded again. A damp floor under a closed door in a warm van grows odor and mildew within a day. Our post on food and beverage truck washing covers the written sanitary procedures that food carriers follow, which apply to many catering operations as well.

A Realistic Food Truck Washing Schedule

A truck working four or five events a week usually needs a full exterior wash every week, with the roof degreased every one to two weeks depending on the menu. Fryer-heavy menus need the roof done more often than a coffee or dessert truck. Catering vans in daily use benefit from a weekly exterior wash and a cargo area clean after any spill.

Wash on the morning of a quiet day or the evening after service, never right before an event, so the truck has time to dry and any problem found during the wash can be fixed. Keep the wash water off the street and out of storm drains: grease and food residue are exactly what local stormwater rules are written to keep out of the drainage system.

Keep the Truck as Clean as the Kitchen

PBD Pressure Washing cleans food trucks, catering vans and delivery fleets at the customer's location in Douglasville and across West Metro Atlanta, with warm-water degreasing, wrap-safe pressure and wash water recovery. We schedule around service hours so the truck is clean and dry before the next event.

If your roofline is turning amber or the generator panel is gray, request a quote or call (404) 933-8559. We will look at the vehicles and set up a fleet washing routine that fits your event calendar.

FOOD TRUCK WASHING: GREASE, SOOT AND CATERING VAN CARE