depends on how old they are they may recover. but yes looks like ur leaves are nute burn. however I may be experiencing the same thing... but mine always seem to just work out.
I hate painting most of the time... but ur painting sounds awesome lol... I think i might have some new darwings anyways just from me doodling latly but nothing to interesting... and I will still try to draw a cannabus cactus lol and the peace and humanity too just have to get in the right mood...