The sunburnt tissue is dead. Nothing will bring it back to life.
As far as trying to get orchid spikes to curve around and follow the light, do not do that!!!! Just let them bloom.
By moving them around, you might end up having buds twist and turn facing in 19 different directions as they turn to the light. I doubt that that is what you want to have happen. The flowers will NOT open and face in a single direction.
