You should see it more clearly on the leaves long before it is on the trichomes. That first picture looks a bit concerning - the triches in the fold/crevice looks like something is on it.. more web-like than individual stalks of capitulated trichomes. When it is on the triches, it looks like a bunch of tiny threads creating a netting over the top of them.
When you see individual free standing trichomes, it's fine. I can't tell if it's just a blurry spot in that first picture or not.
Again, should see circular colonies on leaves long before you see it on the trichomes. If advanced it'll cover an entire leaf not just a small circular initial colony. If you sprayed something on it, it'll spread to stems and anything else it drips on. For future reference, don't use any of the anecdotal 'anti-fungal' sprays. milk, the cornell formula, h2o2, potassium bicarbonate etc - none of it is effective for WPM. There is nothing effective against WPM. cut it out when you see it and hope you caught it fast enough. If you want to lie to yourself, enjoy smoking that mildew weed, lol. I think people just don't want to lose money and willing to sell it to others, lol, so they might actually believe some of these anecdotal treatments work.