[stevehertz]

If you are unable to remove the glue, find or make a thick paper (thin card) cylindrical 'mask' of the diameter you require and use it to avoid getting paint on to the edge of the tweeter eg toilet or kitchen roll former, Pringles box, paper coffee cup, plastic plumbing pipe etc. TBH, a photo of the front of the speaker baffle would also help us. Best of luck.