Oncidium with sun damage, black spots, ailing outer leaves

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Hi everyone,

I have an oncidium that I recently got back after a long period in someone else’s care. It was under too-bright grow lights and received some burn damage, but was seemingly otherwise OK.

I’ve been keeping an eye on it and I suspect there’s also an infection. The spots seem to be worse, aren’t only adjacent to the lead burn, and two outer leaves are yellowing and very spotty.

Whatever this is, it seems pervasive in the plant. Most of my past issues have been solved by trimming an infected leaf. What’s the best way to treat this? When should I declare it beyond saving or not worth the risk to healthy plants in the house?

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