Automotive

Ways to clean hard water stains?

  • Last Updated:
  • Sep 1st, 2021 2:27 pm
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[OP]
Newbie
Nov 2, 2018
74 posts
69 upvotes
Vancouver

Ways to clean hard water stains?

So sometimes when it rains a lot theres some dripping from the concrete ceiling in my apartment garage above my cars rear end. Its starting to cause these stains on my rear window/trunk area that are difficult to remove. I'm guessing its minerals or limestone or something. Can anyone recommend a cleaning product that can help remove these stains without damaging the paint. Thanks.
7 replies
Deal Addict
Sep 22, 2009
2819 posts
1468 upvotes
Markham
Polish and Wax.
Deal Guru
User avatar
Mar 13, 2004
11810 posts
3471 upvotes
Ontario
Best first step would be to have protection on the paint, so wash the car and apply a quality wax regularly (2-3 times a year) that will make it easier to clean off. But if its leaving marks now you need to remove it first & might even need a light polish to fully remove.
Sr. Member
May 6, 2013
784 posts
301 upvotes
Toronto
EP32k2 wrote: Clay bar.
Doubt this is enough, will most likely need to polish. Start least aggressive and work your way up.
Deal Fanatic
Sep 1, 2004
7083 posts
5922 upvotes
Cermatic coating. Less water stays, less stains.

Also, rain water is naturally soft. So it's carrying concrete onto your car. May be your apartment has some sort of envelope issue?

If you are not renting, I would follow up on your condo board.
Deal Expert
Jan 15, 2006
16994 posts
15592 upvotes
Richmond Hill
RSXPrem wrote: Doubt this is enough, will most likely need to polish. Start least aggressive and work your way up.
Polish is follow up after clay bar.
Deal Guru
Feb 9, 2006
12423 posts
7007 upvotes
Brampton
Before claying polishing try to use a chemical decontamination product that's specific for water spot removal. It'll dissolve or at least soften the minerals so less effort is needed for claying or polishing.

Chemical guys has such a product for something at Canadian tire.

Meguairs has a professional product designed for Boats and RV that works very well.

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