I have successfully used PETG as a support material on PLA prints and vice-versa. Allows for dense support to be turned on for great finishes. It sticks just enough to print well, but comes off without any effort when you want to remove the support.
However, is anyone aware of a list or table that shows good compatibility for this kind of application?
For example, what to use for supports if you want to print with ABS? ASA? PC? Nylon?
I tried PETG as supports with PC, but the difference in print temperatures just made it stick too well to remove later. Nylon is too “sticky” and does not come off either.