get a grinder attachment for that nice shiny hilti drill and grind away… also, you could mix some dirt with the glue to camo it better, which BTW, you might be better off using liquid nails or similar for, cause at 80$ per tube of HIT 500, you’ll be wasting some coin.
just as a last note, and maybe a similar ‘no wait…’ as ross, if you chop the ends of the reinforcing rods that hold skywalker wall perpendicular to the earth, then maybe they wont do their job as well? just a question…