A coated car wants a proper hand wash with a pH-neutral soap roughly every two weeks, dried with clean towels, plus an annual top-up spray. That is genuinely the whole routine.
The two things that shorten a coating's life fastest are automatic tunnel washes and harsh alkaline soap. In San Francisco, salt air and fog are already working against you, so those two habits are the difference between getting five years and getting two.
Nothing here is complicated. It matters because a coating is the one detailing product whose lifespan is largely determined by what you do after we leave.
This is the same method we use, and it is what the coating was designed around.
A coated car releases dirt far more easily than bare paint, so a good pre-rinse takes off a genuinely large share of it before anything touches the surface. Skipping this is the most common mistake.
Strong alkaline detergents degrade the hydrophobic top layer. A car shampoo described as pH-neutral or coating-safe is what you want. Household detergent and degreasers are not.
Same discipline as any careful wash. Wheels first with separate tools, then top-down on the paint, straight-line passes. A coating is more scratch-resistant than clear coat, not scratch-proof.
This is the step coated cars need more than uncoated ones, not less. Water beads into tight droplets on a coating, and a tight droplet left to dry deposits all its minerals in one small spot. Dry with clean plush towels.
Bird droppings and sap still need removing within a day or two. The coating gives you meaningfully more time and much easier removal — it does not give you immunity.
A coating-compatible top-up restores the hydrophobic behavior as the top layer wears. In this climate, with salt and fog, this is the maintenance step that most affects how long the coating actually performs.
This surprises people, and it is worth understanding rather than treating as a fault.
A coating is hydrophobic, which means water pulls itself into tight beads rather than spreading out. A tight bead contains the same dissolved minerals as a flat sheet of water, concentrated into a much smaller footprint. When it evaporates, all of that mineral is deposited in one small ring. That is why beading, which is the visible sign the coating is working, is also the mechanism that makes spotting more noticeable.
The important part is what happens next. On bare clear coat, that mineral can etch into the paint and become a permanent crater needing correction. On a coating, it sits on the coating — annoying, but removable, and your paint underneath is untouched. That is the coating doing its job.
Practically: dry the car after every wash, avoid parking within reach of sprinklers, and do not let fog or rain deposits sit for weeks. If spotting has built up on the coating, a dedicated water spot remover formulated as coating-safe will usually take it. The water spot guide covers the full method.
A coating is touch-dry quickly and fully cured much later. The critical window is the first 24 to 48 hours, during which the car needs to stay dry. Rain, sprinklers, fog heavy enough to wet the panels, and washing are all off the table.
In San Francisco that is not a trivial requirement, which is why a coating gets planned around the forecast with you rather than simply booked into a slot. If you can put the car under cover for the first day, or we can find a clear stretch, it goes smoothly.
The install itself runs 7 to 8 hours or more. On a larger vehicle, or when paint correction comes first, it becomes a two-day job — day one for prep, decontamination and correction, day two for the Gtechniq application.
After the initial dry window, the coating continues hardening over the following weeks. We give you the specific care instructions before we leave, including when normal washing can resume.
The routine above is not hard, but it does need a hose, a place to park and forty minutes. In a city where most people have none of those, that is the actual obstacle.
An Exterior Wash & Protection from $100 done at your address on a regular rhythm is the practical version, and it is the correct method for a coated car — two buckets, pH-neutral soap, wheels first, dried by hand.
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That is what turns two years into five. Or book the maintenance wash and we will do it properly at your address.