Installer covered limestone with tyvek and  taped it to the stone. the tape left marks on the stone. so far no solvents or stripers have had any effect. the strange thing is some of the tape marks are dark and some are light. When wet the tape marks act like sealer and do not soak dark but the surrounding stone does, some areas look etched (I think the tape pulled some grain off the stone) and others are shinier than the stone finish. What's going on here?
Stephen Webb