Well,I guess that settles that.
I started using the Smoker's Haven solution when I was around 30, am now 68, and never at any time have had the slightest issue. If any one wants to come to my home with a microscope and a non destructive means of testing, we could look at my pipes. But I am too close to the grave to stop doing what has worked. I have trouble also envisioning what would "fail." If I smoked Vulcanite stem pipes and removed oxidation using "forum approved" methods, every single one of which involves some loss of material, I suspect I would have had something "fail" over the same time period.
One thing that might be cause for legitimate concern with alcohol, though, and by extension I suppose with the acetone - alcohol mixture, would be soaking the stems. I have heard of people doing this with alcohol, but I have never gone that far with what I use. I just put a pipe cleaner in the bottle about halfway, then run it through the stem. Pipes that I have purchased new never take more than one cleaner. A really badly stained estate Perspex GBD, maybe several, but usually just two or three. Evaporation is pretty much instant.
YMMV, but maybe this is just a case of nothing in this world is dead solid perfect. I will settle for something that has worked almost all of my adult life time.