OK. White marks that go away when wet.
Probably calcium deposits from hard water.
If you live in an area of hard water, you must be very anal about drying the car completely. You must not allow water to set up on the car.
If you want the quick and easy way out, try a "glass polish" on the affected areas. But be careful. Some glass polishes are abrasive and will microscratch your paint.
Try Windex first and rub hard with 100% cotton cloth.
BTW Coca cola may get it off, again with strong rubbing with a 100% cotton cloth. But make sure you rinse ALL the coke off immediatly after you are done.
If you want to do it right, the car needs to be clayed. Read thru a few of the threads here. We talk about Clay bars here a lot.
Now the swirls.
There two ways to handle swirls.
And it depends on how deep they are.
But basically you can hide the swirls or remove them.
To hide the swirls you need to buy a wax/poly treatment that is designed to do just that.
I use ZAino (
www.zainobros.com).
This is a complete system to detail your car.
THeir Z5 is a poly coating similar to their Z2 but it has properties that will cover minor swirls. You just keep adding coats until the swirls are no longer visible. Sometimes that is 1 or 2 coats, sometimes it is 10 coats.
If the swirls are deep, you won't be able to hide them.
I've had that on a couple of used cars that I have bought.
You need to use something like Meguiars Medium cut, followed by Meguiars Fine cut, using a random orbital buffer.
3M also has some products that will work just as well. It's just that I have used Meguiars.
These ARE abrasive and WILL cut your "paint".
If you have never done this before I would practice on something else besides a new Murano.
Or you can take it to a pro.
Talk to the dealers. (Not just Nissan...go upscale and talk to Caddy and Lexus dealers) they may know a guy who is really good. I can assure you that even with a random orbital, you can put your own swirls in if you are not good.
Read some threads here about waxing and claying etc.
Hope this helps.
Homer