Hard water spots are mineral deposits left behind when water evaporates — and Southern California water is hard. Left alone, they can etch into the finish. Here’s how to remove them safely.
Start gentle
- Wash the RV with an RV-safe soap.
- Try a water-spot remover made for automotive or marine finishes, following the label.
- Wipe with microfiber and rinse thoroughly.
If spots remain
Spots that won’t wash off may have etched into the clear coat or gel coat. Those need polishing — and on heavy etching, compounding — to level the surface. That’s best done by a detailer to avoid burning through the finish.
What to avoid
- Abrasive pads and household scrubbers
- Strong acids not made for vehicle finishes
- Washing or drying in direct sun
- Letting sprinkler water dry on the RV
Prevent them
- Dry the RV after washing
- Use a deionized or filtered water rinse
- Park away from sprinklers
- Add a protective coating that resists spotting — see ceramic coatings
Let us handle it
See RV detailing.
Frequently asked questions
Can vinegar remove water spots?
Diluted vinegar can help light spots, but rinse well and test first — and avoid strong acids.
Are water spots permanent?
Not usually. Most can be removed; etched spots need polishing.
Does ceramic coating prevent water spots?
It makes them easier to remove, but drying the RV still helps.
Need help with this? See our RV detailing service, call (949) 830-1996, or request an appointment. Appointments are available Monday through Friday, and Saturday appointments begin January 1, 2027.
Have a question about your RV?
Our service advisors answer the phone — and we put the estimate in writing before any work.
