What is this Jawn on my Leaf Device?

First pic does look like water that dried up and deposited some solids. This assumes you didn't spray the spot before you took this leaf. spraying would distort the colony shape and texture. second pic looks like superficial damage to the leaf. don't spray copper fungicide on flowers, just in case. FYI it will never be effective against WPM. there is no product on the market or even available to large farms that is effective. sad truth. sprays will just spread it around. It may look 'better' initially but then it blooms all over the fucking place, again, lol, no matter what spray you use. https://www.extension.iastate.edu/wine/using-ultraviolet-light-way-control-powdery-mildew/ That was shown to work well... important to do it in the dark cycle. there is a magazine/news article that this url is based off of. The original source might be best.