If worse comes to worse, you may need to sand blast to get the old finish of, and then reseal had done some previous research on pavers, and I found the suppliers are more than willing to help end users. Try doing a Google search on paves, and contact the manufacturers directly can offer any guidance.
NOTE: my comment regarding sand blasting, this with expert guidance and testing a small area first. You want to remove the finish, and not any of the actual stone.
Good luck, hope this helps.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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