Once my Porsche sat near a sprinkler on a hot sunny day. Later I noticed similar looking spots that would not wash off. Turns out they were mineral deposits from hard water. I had to use cleaner wax and a buffer to remove them and made a mental note never to leave my car someplace it could get wet while the sun was shining.
I assume your hood is clear coated. I've seen several posts that claim the factory clear coat that comes with some CF hoods is very thin and breaks down after about six months and has to be resprayed. I had mine additionally clear coated at a body shop that way I can buff it out if I need to and don't have to worry about burning through a quickie factory clear coat. Might want to consider that. It only cost me $600 and that included a custom paint job.
As for your stains leaving a wet car to dry in the sunshine will certainly leave spots like yours as the water evaporates and leaves calcium deposits behind so try not to let that happen. That's what it looks like so try the cleaner wax or polish and a buffer.
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2014 370Z NISMO -- HKS Hi-Power Exhaust -- Swift Springs -- BC ER Coilovers -- SPL Suspension Components -- Nismo R-Tune Intake -- Seibon BD CF Hood
Last edited by sandersd; 09-28-2015 at 12:57 PM.
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