I had a volunteer mount a metal plaque on a brick wall in an outside courtyard a couple of days ago. I went and looked to be sure the work was done, and found that the plaque is where it should be on the brick wall, but there is a yellow contact adhesive dripping from the plaque down the brick wall under it. Now, I do know that he did mount it with screws countersunk into the brick and in the back of the metal plaque. I guess the idea of using the adhesive was a good one, just not leaving before making sure all the adhesive had been cleaned off the wall and bottom of the plaque.

Can you remove this adhesive in some way besides just trying to chisel it off. Not sure that is going to get the yellow color off the brick either. Anyone have any suggestions besides not using that volunteer anymore?