I’ve dug around a bit since I saw this and all the chemical lists with BB on it state “no data available” for PETG. Though I am also seeing tons of plastic containers with BB in it for all types of uses.
That being said, I am no chemist and don’t have experience in searching for msds/chemical sheets to figure out such things.
As far as I know (once again, not a chemist) is that BB, BA, and organic carrier oils such as MCT are the most ideal solutions for gear.
For all I know this is just another shit stirring attempt, though for folks who have concerns with such things doing their own research should be done for peace of mind. After all, we are all responsible for what we put into our bodies, as well as trust the manufacturers of what we consume. There are plenty of recalls for any number of things whether it be food, medication, baby formula, etc.
I should clarify this is not me challenging any one statement or opinion.
Someone will likely have a clear answer for all of this, what a rant I have written here.