Wow! I like these chemical and biological processes which can alter the materials. Guys! Can you suggest an easy way to convert PET plastic to PETG? Can we mak

Wow! I like these chemical and biological processes which can alter the materials. Guys! Can you suggest an easy way to convert PET plastic to PETG? Can we make bioengineered bacteria for this process. I make 3d printing filament from plastic waste (currently using abs) and I can find lots of cheap PET plastic but it's not good for printing but PETG is.