dcrzfitter,
The stuff is in sheet form and cut to fit the bottom of the boat. It is drilled out in 130 locations and countersunk. then they take aluminum tapered washers and actually plug weld it to the bottom in those 130 locations.
Its suppossed to be alot quieter than aluminum and fiberglass when hitting rocks, They (Willie) will lifetime garentee it the same as the boat.
They charge $600.00 for this option and Koffler will do the same thing, neither will give a discount because of the effectivness of it. They say its the best you can get and if you want it you will pay for it. Even after all the discounts they give on my option/sales reciept, they still add this in after the discounted price. But before the total.