I put the blue painters tape along the wing trailing edge and the leading edge of the moving surface. I then cut the tape to reveal the holes. When the glue oozes out the acetone used for cleanup will only get on the tape. You also don't have to worry about getting all of the glue off as the tape with the dried glue will be removed. When all is dry just peel the tape off. It takes a little work right around the hinge pins but no glue residue left when complete.