One thing that seems to be getting left out on the tire/rim prep is to remove the mold flashing that appears on some tires, this prevents the tire from laying completely on the rim. When you sand, grind, etc. the seating surface on the rims you are only wanting to break the glazed surface, not make it real ruff. Reclean the rim after breaking the glaze. CA is strongest on non porus surfaces when it only forms a very thin layer between 2 relatively smooth surfaces.

Ed M.