We are involed in the restoration of our Church. The vestibule was covered in wall to wall carpeting that needed replacing along with the rest of the Church. Under the Vestibule carpet we found what was once beautiful terra cotta 8x8 tiles. We would like to find a way to remove the thirty year old glue that was left behind. In high traffic areas it appears to be wearing away, but when a fellow Parishoner who owns a floor and carpet cleaning business tried steel wool on his buffing machines, the substance wouldn't budge. We really don't want to have to recarpet the area. The tile would be in keeping with the roof and other aspects of the original design that was lost in 1969 when an attempt was made to renovate. Any advice would be of great help.