Just a back yard amateur here too! After going thru all this effort you have I don't suspect you would want a section of relatively narrow (width) ACX to delaminate/fall off the first time you hit the piling a little to hard? Never mind the water spray its going to receive over time and that will do it for sure.
My concern on the ACX is that it looks like it going to be difficult to properly seal the bottom edge to the hull sufficiently to ensure spray from getting behind the edge and working it's magic.
Kamikaze
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74 V20 CC with a 150 Johnson (Gone but not forgotten)
89 V20 Cutty with a Tower (Build in process)
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