What are these stuff on leaves

Whats up?

On my babies leaves i have these shiny dots. What may be the problem? I applied Advanced Nutes Revive as foliar feed. May those be liquid marks?

Also on lower leaves i have this frosty looking thing. Can it be powdery mildew?

Because I had to go away for work I kept my babies on flush for a very long time before switching to 12/12. Thats where these problems started.

I m attaching couple of pix.

Any help will be highly appreciated

Spots most likely due to the foliar spray but you’ve got more problems than that. More details needed.

You got thrips. Typical damage on the leaves and I can see a couple in the first pic. Juvenile white one on the left side of centre of that middle leaf finger with an older one to it's right. I see other ones on many of the other leaves too. I have some going atm myself and have just been hunting them down by hand for months on a couple vegging plants but need to get to spraying as I'm planting more ASAP.

I use Safer's End All concentrate and when I mix it up i add 10ml/L canola oil. Spray very well every 4th day for 4 or 5 treatments to get rid of them. Same procedure for mites.

Not PM on that bottom leaf. Looks more like toxic salts buildup so maybe back off on nutes a bit. Sometimes lower leaves just get tired and die too so if it's not happening all over I wouldn't worry about it.