Every two to four weeks in normal use — weekly in salt season, and promptly after anything corrosive lands on it. The regular mobile car washing schedule is paint protection wearing a convenience costume: the interval exists because contaminants damage on a timeline.
What sits on paint, and how fast it works
Bird droppings and bug remains are acidic and etch clearcoat within days, faster in sun. Tree sap bonds progressively harder until removal risks the finish. Brake dust is ferrous and embeds; road film holds moisture and grime against every surface. None of it improves with age.
The two-to-four-week rhythm keeps everything in the easily-removed stage. Spot-clean the acidic offenders — droppings, bugs — between washes rather than waiting.
Salt season is its own regime
Missouri road salt is a corrosion subsidy applied all winter, and it works hardest where you cannot see — underbody, arches, seams, brake lines. Weekly washing through the salt months, with genuine attention underneath, is the schedule that protects the metal.
The end-of-winter wash matters most: salt left in the seams keeps working all spring.
Protection changes the arithmetic
A waxed or sealed car sheds contaminants better, washes faster, and holds the line between washes longer — protection and interval work together. Garage-kept cars stretch the schedule; trees, gravel roads and sprinkler arcs shorten it.
A standing appointment removes the decision entirely, which for fleets and busy households is most of the value.
Every few weeks, at your driveway, no decision required — ask us about a recurring slot. Read more about regular mobile car washing →