leaf spots

My son sprayed ceramic car coating on some of my leaves... wiped and rinsed off and I thought the burn was from that, but wondering if I've actually got a calcium deficiency. Thanks for any help

Dutch passion auto ultimate, day 55. Organic grow. Bio bizz all mix soil Bio bizz grow, bloom, cal/mag, top max. What is going on with her leaves? First I noticed red spots on the bottom fan leaves, I fed cal/mag and then the problem went away, come pre flower. It was back, worse than...

Hi guys, This is my first grow; I've made lots of rookie errors along the way but have managed to make to Week 8 relatively unscathed until now. I've got two 12L pots growing outdoors. First one an "Alpujarrena" seems remarkably robust, with no real issues to date. The second, BCN Critical...

Hey guys, I'm currently on day 23 of my first autoflower indoor grow. I've got 15 GG4 (Fastbuds) girls in coco/perlite under 3500k, 405W quantum boards, being fed GHE Floracoco nutes. Everything is going very well but I've noticed some irregular, mustard-colored markings on the leaves of 2...