Emmons is correct, I'll add a couple more points...
I use 2 part epoxy myself. Get a hardwood floor scrap (or board), and use it as a "form" to glue your scale and liner up with. Put seran wrap or wax paper on the wood flooring scrap to keep it from sticking to your handle. Glue your scale to the liner, and clamp it to the flooring scrap with clamps, let it dry.
For the full tang, I like to groove the sides of the tang with a dremel type tool and cutting wheel, to give it something to grab more epoxy. This is the same principal as Emmons was saying about the dimples in the scales.
Dan