Poor choice, though folks do it.
The trouble is that the PE will creep over time (a cutting board will quickly warp if a significant weight is placed on it), giving you far less support than you think you have, unless you go VERY thick. Prelaminated FRP is probably best, followed by SS (difficult to work) and aluminum (can corrode is wet).
Wood is respected by many; just not my choice.
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")
"Well, I just climb up to them."
by Joe Brown, English rock climber
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