First Encounter with POWDERY MILDEW

So I bought some OG and Purple Kush Clones (I know og is full of pm in cali so I guess I'm a moron, but I love to smoke the strain!) They are now in transition (week 5) I spotted mildew yesterday when nute changing. All the spots about the size of a q-tip head or a little bigger. For foliar sprays I hear milk, or serenade, or immunox. And I inherited a sulfur vaporizer and a fungaflor bomb. What is the best plan of attack? I'm about to hit it with serenade right now to ease my mind, but I want to get a schedule going.

Here's my best guess....serenade, milk, or immunox one week, sulfur vape the next? Is the sulfur and fungaflor overkill at this stage?

Just sprayed with serenade... anyone out there have advice??

fungaflor I'll never use again. NPk industries (the makers of mighty wash) makes a PM wash, if it works anything like mighty wash does on mites it's the shit. I've never used it so I don't know. I use eagle20 when they are small and have never had an issue with PM. Probably because it's pretty damn dry here.