Paint issue

[Skidmarks]

Guys, I’m in need of some advice.

I park my car in an underground car park and there was a rainwater leak which deposited a whole lot of whitish water and a fairly localized buildup of “something”.  Most wiped away but there is this residue that is hard/impossible to get off using Quick Detailer.  

Here’s the rub.  Its in the middle of the roof on a deep clear coat over a carbon weave (visible).

I don’t want to hack at it but does anyone have any thoughts on how to treat/remove?

I don’t think its been etched into the surface.

 

[Peter M]

I would test this on a very small discrete area first before trying it on the stain:

https://www.bunnings.com.au/clr-1l-calcium-lime-rust-remover_p4460670

 

 

Nah, that's not my style.   I'll just go hell for leather on the stain!  She be right!🙄

 

 

[Lucky Phil]

@Skidmarks this is calcium from the concrete.  I had the same problem from my car park on a black car.  Really tough to remove.  I don't think I ever got rid of the residual stain.  I would take it to a professional.  Maybe @JB can assist

[D2000]

What about trying a clay bar with the detailer as lube?

[TINGY]

4 minutes ago, D2000 said:

What about trying a clay bar with the detailer as lube?

Yep i would try this, you can't really do any damage with a clay bar.

[Skidmarks]

Thanks guys.

Had a go with a very mild cleaner wax, let it soften and then worked at it slowly for about 30 minutes on and off and it removed it.

Thank fark!