The head is probably okay from my understanding on it's Resistance to the type of inks. the damaged damper system would cause all that. My only thoughts would be to test print with it in another printer, or after you replace those parts. If the face is still shiny and the electronics didn't get any liquid/ink on them and the manifold looks fine its probably fine.
Again, A grain of salt
I did confirm which printer model with the seller before I bought the ink and I let some junk parts sit in the ink for a number of days (all was ok) before I charged up my printer. I messaged the seller again but at this point it's a done deal. I'm planning to pull out the dampers and check their condition (messy task). Is there any way to know whether the head is damaged? All I can see is the manifold on top and the plate on the bottom which look ok.
Do they claim it wont fame epson parts for any model of epson or just certain models?
The epson 3800 head is not suitable for at least a lot of if not all uv inks but the 3880 head is ok with them all you just need to change the dampers etc.
I've followed UV build threads that had success with Aomya inks and the folks that sell it claim that it won't cause damage to stock epson parts - but one never knows until it's sitting in the machine. I'll post with updates.