What is the best build surface for PETG? This question doesn't necessarily have one answer.  I'm looking for a build surface that doesn't tear up when removing the PETG print, but still holds the PETG down and keeps it from warping.  I am printing PETG with the z-height almost too high.  Higher causes the PETG not to stick and warp or even release during printing.  But, I still have trouble with PETG prints tearing my build surface.  I've tried PEI and black build surfaces that don't identify the material.  The build plate on my hot bed is glass.
Removable steel spring sheet with PEI textured coatings
I have been using textured PEI string sheet for most of my prints, just love it.
Prints attach so good but not hard to remove(with proper nozzole Z-offset).
If the prints are small and seems hard to remove,heating up the bed helps a lot.
Almost never used the smooth side, even with proper z-offset, it still damages the surface quite fast.
Here's the link i bought before:
Removal Spring Steel Sheet Pre-Applied PEI+Magnetic Base
This is my setup on a ender3pro: