sick plant need help

i got this as a clone and it has these rust spots on it and i need a cure fast.can anyone please help me find out what this is.

reading this, I would suspect a magnesium deficiency :
The Complete guide to Sick Plants,pH, and Pest troubles! - International Cannagraphic Magazine Forums

scroll down a bit, you'll see it ... you might want to Bookmark that web page, for future use, it's pretty good reading :thumbsup: