Mr. Ben, hello fella. I have acquired some plastic frames when I purchased some nucs, supposedly survival stock. I always look for beetles in the groves at the edges of the plastic frame and yes, the small hive beetle will hide in the spaces. As you probably are aware the grove is perfect size for protecting beetles and providing a safe spot for the ding dang beetles.
The few plastic frames that I have are brood frames so I have no experience with extraction of honey in plastic frame. I use the green plastic frames for drone brood production and this works well for me. I always have to check for beetles though but realize I am talking about one green frame in a breeder quality hive with 19 other wood frames. I could easily envision a nightmare with beetles if all frames were plastic because as you know, I spray each and every beetle I find in a hive.
Sometimes the bees will propolis some of the beetle safe spaces in plastic frame denying use by beetles.
I can?t answered you with a thumbs up or down: no honey extraction experience, just brood. And yes sir, the beetles make use of the safe area on the edges, but works great for a single drone frame in my apiary. My bees draw out the green frame without issue.
Best of Health to your bees, everyone.