signs of powdery mildew during veg

I have 3 monsters ive been vegging for over a month from clone and I just noticed a few leafs on one of the plants has a few small spots of powdery mildew. I planned to start flowering any day now but im here to ask if I should even bother?

Is there a way to stop it now before flowering or is it toast?

Use some neem oil or anything to get rid of the mildew, Ive heard of baking soda working as well. If it is only a little I suggest fixing the problem before flowering. Definitely no reason to scrap the plants.

spray well with skim milk. wipe effected area