Hey everyone, I am new here. I bought this 2015 RX350 back in 2015. I live in Edmonton, AB. This is the second year I noticed those spots around my car mostly around lower part of doors and wheels. We have long winter here, and local city uses calcium chloride solution with an added molasses corrosion inhibitor for anti-icing during the winter. I asked the local dealer about those dots, they told me they are not rust, just dirt, can be scratch away by fingernail. But I am having hard time to remove them. What are those? How can I clean my car?

 

I would first try using a clay bar on it. You can get them at most auto parts stores. You also need lube to spray on the car as you wipe the bar over the paint to remove the debris. Then follow with a good synthetic polish. Get some microfiber cloths.
There are several detailing forums on the web where you can learn about what to use and how to use it. There is also a detailing sub forum on CL https://www.clublexus.com/forums/aut...detailing-122/

 

Google “industrial fallout”.

 

Thank you, Clutchless.

 

Thank you, JDR76. That make sense.

 

Your car needs a full decontamination, paint correction and ceramic coating.

 

I would spray a product that targets iron like Sonax Iron X, then clay, polish, and add a durable sealant. It is likely iron particles and other fallout that has collected/attached on your paint and then some of it leeches off when wet what which gives a rust appearance on top of your white paint.

https://www.autogeek.net/carpro-iron-x-cleaner.html

 

Pay an independent detailer to clay bar, wash, polish and seal your paint. The detailer will probably give you a few options, with a standard wax as the cheapest and a ceramic coating (if offered) as the most expensive. A ceramic coating will be the most durable and lasts the longest, but if you don't mind doing your own application twice a year (spring and fall), you can probably get away with using a good sealant or wax.

You can do it on your own, but unless you plan to do a lot of learning and you're ready to invest in your own equipment and use it routinely, it might be best to leave it to the pros for now.

 

Thanks, I think I will let pros to deal with it.