This has probably been covered somewhere, but let me offer a tip on laminating with epoxy. My first use of West Systems epoxy was last night, laminating 1/32" plywood skins onto ARF Strega flaps to gain some stiffness. The mixed epoxy is "water white", and the only way to tell if I was getting coverage was low-angle reflectivity. Gee, I missed the old Hobbypoxy Formula 2!
This morning I called West Systems and asked about tinting the epoxy using artist's dry pigments. Their engineer said it was a fine idea, and would not adversely affect bond strength. Then I did the 2nd flap, adding a teensy bit of blue pigment to the mix. Now, not only was it easy to see what was covered, but I could also get an idea how even the coverage was based on the depth of color. Oh; "teensy" in this case was the equivalent of a 1/8" "cube" of pigment mixed into 1 oz. of resin/hardener. A 2 oz. jar of the pigment costs about $20 and contains (at least) several thousand "teensies". <Groan> I may try mixing custom dope colors next.