Do a search ( use the key word Tribute To Polaris 68, as I assume you're speaking about the Vintage, not the original ), and you will find a lot of posts about straps.
I've tested it in rough conditions last summer, and no problems: I had water activities with it, I've even immerged it in a glass of beer, you can even make some thin hairlines on the plexy, you can polish it...
So, no problems.
Now, avoid to hit the plaexy on a stone, wall, ground, table .... As the plexy is not resisting to every thing, but you have a spare plexy in the box, just in case...
Best,
Nicolas.