The pins literally just fell off, leaving a flat spot with a tiny bit of exposed gold behind, no ceramic cracking at all.
The board itself went through the ultrasonic cleaner in two go's - mine is large enough to do about 2/3 of the board in a single go, but after it was ultrasonic'ed, i scrubbed it with a soft bristle toothbrush and dish soap in the sink, front and back, then back into the ultrasonic to loosen any additional grot, before a final once over in the sink with the toothbrush and some more dish soap, then rinse with water and then into the oven at 70*c for 20 mins to dry out.