Mold?

Absolutely a colony of WPM. By this point it is already spreading spores. Good luck. amputate liberally to slow it down. i strongly suggest not spraying your plant in flower. First what oyu use will not kill the fungus. it my 'rrinse' it off the surface, but now it is dripping all over and you end up spreading it worse than it was before. there is no effective treatment for WPM. Even the stuff large farms have access to that the public does not has a very low 25-33% effectiveness. you drip nasty wpm-water all over you buds, you get wpm in your buds. plus, the surface you 'cleaned' it from will just regrow because the mycelium network still exists under the surface of the leaf. be glad you are at the end of a run. keep an eye out for more spots. remove that leaves and anything that may come in contact with it. hope you don't have too long left. it escalates in a exponnential way, though slow at first. 2 weeks it'll be a mess if you didn't remove fast enough or if a couple spots were not caught. Also when you are drying your weed if anything seems a bit off isolate it away from the other flower. your 30x magnification, if you have one, can see wpm. it'll look like a weird netting across the trichomes like spider webbing coating the triches and between them. So, are you hitting the dew point at any point or spraying your plants needlessly with water? if so, stop those habits as they are probably why you have WPM. It's surprisingly easy to hit the dew point in the 15-30mins after your lights turn off... 28C / 55-60% will be a dewpoint approaching 20c, which after lights go out, the temps drop precipitously for most of us. you can download dewpoint tables to reference to see what you need to avoid. Avoid standing water either caused by dewpoint or OCD of spraing plants that have zero problems. WPM is 95% self-inflicted. look your your habits as to the cause.

That is powdery mildew, its not the worst pest that can happen to you but it is annoying indeed. It can ruin your harvest if untreated. You can treat it by spraying hydrogen peroxide diluted in water ( 1 to 10 % hydrogen peroxide, start with 1% and increase carefully if it doesnt work, high dose can harm your plants too) You want to dimm/raise your lights when spraying for an hour to let it soak in. You should not let the leaves stay wet though for longer than 4 hours. That is when diseases like this can breed, if your leafs stay moist/wet for longer than 4 hours. Avoid high humidity ( over 55 % ) and prune leaves that are touching/overlapping each other. Maximize the airflow. You want to be lollipopping your plants also and avoid having too much foliage in the shadow Good luck, DM me if you have questions

This looks like powdery mildew, plant disease that causes a powdery growth on the surface of leaves, buds, young shoots, and flowers. Like a fungal thing wouldn't want to say to much as for how to proceed as i haven't had it.. yet..