I have just 0 problems with pei. Powder coated pei are the best. Tried garolite but not enough benefits for my usage.
I print almost daily. PEI wares down to quickly for my use case. I will agree on a fresh sheet of PEI Garolite is worse. However after a few prints. Garolite is more consistent.
Would you be willing to share your source for Garolite in Canada?
Spool3D in Calgary sells sheets of FR4 (the flame resistant version of G10) that are bonded to spring steel sheets. I use with a few drops of the nano polymer adhesive they sell but would probably be fine without (A few drops in IPA seems to do the trick for ABS, lets me spread it extremely thin). I used Buildtak for a while and their surfaces are great, but this was a lot cheaper and extremely resistant, plus I like the surface finish it gives (Also I can source domestically, partly the reason I switched)
I got mine from Grainger. Though I do think Fastenal has some too. You want it as thin as possible I got 0.062" and it works excellently.
https://www.grainger.ca/en/product/SHEET-STCK-12-W-24-L-0-062-T/p/WWG3HMT1
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