You think the Oxy is causing some damage to the bottles? Have not seen that. I only do the full treatment on "new" used bottles. Since its my least favorite part of the hobby we are pretty anal about rinsing out bottles as soon as they are empty and if I put a label on it is only the easy peel variety.Love an Oxy soak, but I'm starting to notice that some of the bottles that are on the 2nd or 3rd pass through my delabeling pipeline are starting to get "oxidized" on the outside. It makes me worry about the insides and those get recycled. I'm now using a dish soap soak for unlabeled bottles and an Oxy soak for new labeled bottles.