I have a couple plants that have some leaf thing g...

hey there growmie, so there's a bunch of things happening here, starting with the yelowing between the veins is a phosphorous deficiency, the colorful discoloration that's a potassium deficiency aka PK deficiency which is pretty normal at this stage of flowering because the plant uses more of that to make buds. The speckled burning on the leafs that's linked to calcium deficiency, basically it seems that the silicum to cal mag ratio should be opposite what it is going into flower. some of the grey on the leafs seems to come from that splatter when you were watering, nothing to worry about i think the powder eventually gets absorbed, but you can always wash you buds if you're brave like that. then there's the leaf curling and seems that could be linked to root problems probably stemming from the "sweetners" or sugar/molasses based terpene enhancers, they might ve helped the soil matrix bacteria blow up causing some stress in the root zone. See the sharp "bite mark" looking speckled things on some of the leafs, seems like insects actually, you might have white flies or something, i'm probably being paranoid but it doesnt hurt to check. so fix your nutrient schedule probably by going simpler or feeding less often but more precisely and you should be able to avoid most of these problems next run. To be honest it's hard to say if it's a deficiency or lock outs, if it's lock outs it's just from feeding too much so just revert to a water water feed water water schedule which you should be following in any case. Hope this helps ! 🚀