These are for table tops in bars/restaurants and clear acrylic or polycarbonate is the most scratch prone material there is. Unfortunately they wouldn't last a week.
As mentioned above we initially tried the Clearshield hoping to avoid a laminator but it didn't work at all in the tests we did. It would literally peal right off the ink. =/
I only mentioned it because the "Production Clear" was described to me by the rep from Manabu as being tougher and being formulated specifically for UV inks.
Have you experimented with any clear epoxies?