polish

I came across this video recently, it shows a product to use to get rid of water spots.  Might be worth a go.  I‘m going to get some myself to try.

https://m.youtube.com/watch?v=sjtN9AzvuJM&feature=youtu.be

Here is a link to the product itself:

https://www.in2detailing.co.uk/koch-chemie-fse-finish-spray-exterior.html?acc-xfx=85fc37b18c57097425b52fc7afbb6969

ChrisRs and the other pro detainers on here may be able to add some more info about it