Reply from PrimoChill Support:
It shouldn't cause any damage, no. Giving them another rad clean treatment closer to when you have the water to flush them and then neutralize and treat them with primoprep wouldn't hurt either. It would help make sure the oxidation is clear.
Well, too late now - I've already flushed the rads with tap water.
I'm gonna give them another treatment when the new bottle of Rad Clean arrives.