Off Topic A place for you car junkies to boldly post off topic. ALMOST anything goes.

Possible Rusty Paint

Old 04-11-2012, 07:32 PM
Junior Member
Thread Starter
Join Date: Feb 2011
Posts: 6
Default Possible Rusty Paint

Ok this is a weird one. We bought a 2012 Mazda 5 with the pearl white finish in February 2011. After last winter I've noticed slight rust specks all over the car. At first I thought the car was rusting but noticed it on the plastic body parts as well. Best I can figure the metal flake in the paint is rusting. Anyone experiencing this with their cars? Once again you need to look real close to see the rust specks.

Thanks everyone.
Old 04-18-2012, 09:00 AM
Junior Member
Thread Starter
Join Date: Feb 2011
Posts: 6
Default Answer

Well judging by the 90 people that read this thread and had nothing to offer I can only assume they have never heard of this phenomenon either.

I'm a victim of "rail dust". This is what the Mazda dealer explained to me. Google it if you don't believe me. He said that the metal particles from from train wheels rolling on their tracks creates a metal dust that lands on your car and then begins to oxidize. We do cross some rail tracks from a commuter train in our town so it's possible. These particles can come from automobile brakes as well, he explained. The remedy is to go buy something else I've never heard of, a clay bar. Basically after you thoroughly wash your car you rub this chunk of clay over your car. Besides removing the rusting metal particles it will take off bugs, tar and other stubborn malities. I've bought the clay bar but haven't used it yet so I'll report later on the results. The reason this was more prominent on my car is because of the white finish. You probably have it on your car but don''t know it.

The things you learn. I thought at 50 I had heard everything about cars but I guess not. Ok so who else has heard of this?

Old 04-18-2012, 02:08 PM
Senior Member
Join Date: Feb 2012
Location: Tirol, Austria
Posts: 756

I have heard of this and seen it as well, when I was working at my last job (Caterpillar dealership) we would get some components in on the train that looked yellow with metallic brown paint, we ended up just sanding and repainting most of them so the warranty was preserved. Clay bar should take this off since it is just surface rust and should not be in the paint layers.
Old 04-18-2012, 02:19 PM
Join Date: Dec 2011
Location: Canada
Posts: 2,636

I believe what you are experiencing is specs of brake dust. Especially with your colour of car.
Is it more pronounced on the side of the car behind the wheels and not on the hood? if you answered yes to this question, it's brake dust. I had the same thing happen on an earlier vehicle. The hot specs grab on to your car. You may want to inquire about different brake pads.
Z-18 Clay Bar Instructions
Clay Bar Treatment
Old 08-18-2013, 04:29 AM
Junior Member
Join Date: Aug 2013
Posts: 2

I believe clay bar will also do the job
You may give it a try for this clay here:
3M Perfect It III 38070 Cleaner Clay Bar Auto Detailing | eBay
Related Topics
Thread Starter
Last Post
11-13-2011 05:03 PM
Mazda Pickup Trucks
09-26-2008 10:24 PM
Mazda MPV
01-13-2008 04:00 PM
General Tech
05-11-2007 05:54 PM
Mazda CX-7
04-14-2007 03:46 PM

Thread Tools
Search this Thread
Quick Reply: Possible Rusty Paint

Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.