How often to wax a car that never sees a winter
Search this and the answers come back in seasons. Wax in spring before the summer heat. Wax again before winter. Twice a year, with the change of the seasons. Every one of those is written for a calendar we do not have.
A coat of wax is a sacrificial layer. It sits on the clear coat and takes the sun, the rain and the grit so the paint underneath does not, and it is used up in the process. So the useful question is not how many months have passed. It is how hard the layer has been working.
What spends it here
- Sun, every month of the year
- This is the one imported advice cannot account for. A car in Britain gets a few months of weak winter sun. A car here gets the same overhead load in January as in June, so a coat that would last a season there is being spent year round.
- Heat
- A dark panel parked in the open gets far hotter than the air around it, and a traditional wax softens as it warms. It does not vanish in an afternoon. It thins faster than the tin suggests, because the tin was written for somewhere cooler.
- Rain, and what is in it
- Rain carries dissolved minerals and whatever is in the air, then dries on the panel and leaves them behind. Wax takes that contact instead of the clear coat, which is its job, and each time it does so there is slightly less of it.
- Strong detergent
- Washing-up liquid and the harsher traffic-film removers strip wax quickly. A car washed that way is unprotected from the next wash onward, whatever was put on it a month ago.
How to tell it has gone
- Watch what the water does
- On a waxed panel water pulls into tight beads that sit up high. As the wax thins the beads flatten and widen, and on bare clear coat the water spreads into sheets and runs off in a film. Flattening beads are the honest early warning.
- Check it after rain, not after a wash
- A freshly washed car sheds water well for an hour or two whatever its condition, so a test straight after washing tells you very little. Look the morning after rain instead.
- The back of your hand across the paint
- A rough, gritty feel is contamination stuck to the clear coat rather than lost wax, and waxing over it traps it. That one needs the surface decontaminated first, which is part of a detail rather than something to do with a tin and a cloth.
This is worth more than any interval on this page, because it answers for your car rather than for cars in general. The schedule below is only what to expect while you get used to reading it.
- The middle column is the useful one
- Beading and sheeting are easy to tell apart and by then the answer is obvious. Beads that have gone low and wide are the early warning, and they are what to look for.
- A wash flatters any panel
- A freshly washed car sheds water well for an hour or two whatever its condition, so a test straight afterwards tells you very little.
- Rough is a different fault
- If the back of your hand finds grit, that is contamination stuck to the clear coat rather than lost wax, and waxing over it traps it. That one needs the surface decontaminated first.
The interval, by where the car sits
- Parked outdoors, no cover every 6 to 8 weeks
- Full sun load and every rainfall. This is the default for most cars here and the shortest interval on the page, and it is the case almost all imported advice gets wrong.
- Covered carport, driven daily every 2 to 3 months
- Shade extends it because it takes the sun out of the equation for the hours the car is parked. The driving still spends it, so it does not stretch indefinitely.
- Garaged, driven at weekends every 3 to 4 months
- Little exposure and little use. Worth doing on schedule anyway, because the coat ages whether or not the car moves.
- Near the coast closer to 6 weeks, and rinse between
- Salt reaches a long way inland on the wind, and it draws moisture out of the air onto the paint. It keeps working between washes, so the coat runs out sooner here.
- Through the rainy months the same, or slightly more often
- The instinct is to leave it because the car keeps getting wet. That is the wrong way round. Wet months are when the panel spends the most time with something sitting on it.
These are our own ranges from the cars we look after, given with the reasons behind them. They are not taken from a published figure, and we would rather say where they come from than dress them up as one.
Three things wax will not do
- It will not stop swirl marks
- Swirls come from what touches the paint, usually a dirty cloth or a dry wipe. A coat of wax sits above the clear coat and has no bearing on that, so a waxed car washed badly ends up swirled like any other.
- It will not remove anything
- Wax adds a layer and takes none away. A scratch or a patch of haze under it is still there, looking slightly better because the surface above it is glossier.
- It is not a substitute for washing
- A wax over a dirty car traps the dirt against the clear coat and holds it there. The wash comes first, every time, and the wax goes on a surface that is genuinely clean.
Waxing is part of the protection at the end of an interior and exterior detail, and we come to wherever the car is parked. If you want to know which interval yours is on, send us a text and say where it sleeps and what the water does after rain.
Related
- How often to wash the other interval
- What buffing does the one that removes
- What is on your paint before you seal it in
- Home Service Car Wash the wash that comes first