I’m an old hand. Had the machine since August!!
I found the same, PLA always left stress marks where you needed to tear it or cut it away.
Then I upgraded my slicer software to Simplify 3d and installed a cooling fan on when I print with PLA, and I find that the supports just fall away in most cases. For deeper marks, I have started to use clear nail varnish - it fills the tear and is hardly noticeable…
I’m sure there are lots more suggestions on the way!!