Do you have a picture of rust spots, and their relative size?
I've had rust spots on white cars before too. I currently have a white Hatchback (no rust spots).
The small rust spots I've seen on my past car were corrected by claying the paint to pull out the ferrous bits that rust, and eventually corrode through your paint to the base metal.
I'm not sure this is the same situation you're in, or how large your rust spots are. But maybe it might help you?

 

It's called fallout from brake dust buy autoglym and spray on wash off wax

My white rav4 had this allover after one year I panicked... went on Google saw that everyone has this issue .. purchased this stuff based on reviews ..spray on rinse off ... all came away but it'll strip wax off as well u need to wax after .. it also turns purple where the iron deposits are its cool so you know if you got everything

 

It's called fallout from brake dust buy autoglym and spray on wash off wax

My white rav4 had this allover after one year I panicked... went on Google saw that everyone has this issue .. purchased this stuff based on reviews ..spray on rinse off ... all came away but it'll strip wax off as well u need to wax after .. it also turns purple where the iron deposits are its cool so you know if you got everything

Thanks for this tip! I have these spots all over the hatch and had no luck removing them with elbow grease...

 

And don't take it to a shop that bottle cost me 20$ canadian it's half full and I've had had for 3 years

 

That's fairly common with all cars, but it's more visible on white. It's called rail dust, "the term originated when cars first started being delivered by train – small particles from the track would fly up and land on the cars." Today it's caused by all manner of contamination on the roads to residue from your brakes wearing.

You can remove it yourself with a spray that helps dissolve the contamination followed by the use of a clay bar. There are a lot of products you can use, personally I like ferreX by Optimum. You can search YouTube videos on how easy this is, or you can have a professional do it for you.

 

Autoglym Magma 500 ML Ferrous Fallout Remover, Automotive Care - Amazon Canada

Autoglym Magma 500 ML Ferrous Fallout Remover in Automotive Care.

www.amazon.ca

 

Thanks for the answers and rail dust is what they told me it was called. Normally I wouldn't take to them but they do the clear xpel wrap as well gonna do the front bumper and 1/4 hood

 

Rail dust is what old timers used to call it because the cars came over on Trains ... your car didn't have it on it when you bought so how did rails cause it? It came from your brakes which is essentially the same factor as rail dust... iron

 

Try ironx.

 

I had mixed reviews with that product
Might just be me tho... nonetheless whichever fallout removing product you buy it should work as advertised

 

Noticed this on my last vehicle which was white. It's on every vehicle you just don't see it as much unless it's a light colour like white. I used Iron X a few times. Took it off but I found it wasn't as easy as I would have liked. I'd let it soak a bit too. Was always concerned I'd be scratching the paint removing the spots. I doubt I would buy another white vehicle after going through that. Not like it's the end of the world but I just don't want to deal with it anymore.

I bought a few types of fallout removers from eshine at the time: CarPro Canada Iron X CQuartz

 

Noticed this on my last vehicle which was white. It's on every vehicle you just don't see it as much unless it's a light colour like white. I used Iron X a few times. Took it off but I found it wasn't as easy as I would have liked. I'd let it soak a bit too. Was always concerned I'd be scratching the paint removing the spots. I doubt I would buy another white vehicle after going through that. Not like it's the end of the world but I just don't want to deal with it anymore.

I bought a few types of fallout removers from eshine at the time: CarPro Canada Iron X CQuartz

This is why I don't use ironx. .. with the stuff I used I didn't even scrub it washed off I was too worried about scratching my new car

 

I had the same issue with my white hatchback. I used clay to remove the rail dust prior to polish and ceramic. From what I can tell, it hasn't returned. Fingers crossed it doesn't happen again

 

Mine was only an issue after the 1st full year with a winter. I did it initially in the summer with its 1st wax and it's never happened again [emoji533]

 

I too have experienced the infamous rust spots, but not on my Corolla. I found a few on the rear hatch of our ‘19 UX 250h, which was Eminent White Pearl (similar to Wind Chill Pearl on the ‘21 Corolla). I was able to remove a few of the spots using Griot’s Speed Shine and a clay bar. The more stubborn stains I was able to remove by hand using Griot’s Correcting Cream and a foam pad. I didn’t need my orbital buffer. I then went over the hatch with a finishing sealant.

 

I honestly sprayed that stuff on let is sit for 5 min watch it turn purple as it dissolved the iron spots then hose off ... never took a rag to the car.. then just used spray on wax to seal again... cars perfect for 3 years. I don't like taking force to the paint if I don't have to

 

This is super easy and you can do it yourself and save a ton of $. Take a look at CarPro IronX - CarPro Iron X 500ml (17oz)

 

This is super easy and you can do it yourself and save a ton of $. Take a look at CarPro IronX - CarPro Iron X 500ml (17oz)

Ironx is garbage takes several applications and muscle to remove deposits, plenty of other products on market that will work better at cheaper price point

 

This is a brand new 4runner where I'm from. A buddy owns a detail shop where I'm going Friday. I will post more pics

 

Here my wife's brand new rav4 using autoglym

 

I am happy to report after yesterday at my buddy's detail shop I am rust free and looking pretty sharp. I did post this pic in another thread..