I just finished dipping some seemingly sensitive acros with no problems. 10mL in about 1.5-2 cups of water for 10 minutes, then vigorously shaking them out. I just made sure that the bayer went into solution and not sitting on any of the coral skins.
The acros were an efflo and pink lemonade, then a monti cap and a monti danae, and there was a favia in there as well (dipped it too just in case it had black bugs, and because it was in the acro tank and could in theory pick up red bugs or AEFW as well).
So far 4 days later, things are looking fine, and the acros actually had the least impact, as they opened up with PE within 12 hours of going into my tank.