Ak-47 Some weird growth

So my plant is 6 1/2 weeks old .
I use Foxfarm nutrients and I just started using cal-mag
Because I thought maybe I had a calcium and magnesium issue but I noticed that weird growth on some leaves like the one shown
Other than the issues I told you everything else seems to be fine any help would be appreciated thank you .

Do you have some pictures?

Yeah I don’t know how to upload them what’s the easiest way I have really good pictures

Easiest way to do pics is to drag and drop… But wait for them to load before posting…


Possible fungus rust?