Repointing of existing flagstone front proch
I have an existing flagstone front porch and walkway. The flagstone itself is in good shape and has a good pitch to it. However, the pointing between the flagstone is cracked and missing in many places. Also, the previous owners attempted to repair it in some places, but did a messy job having not removed excess concrete on top of the flagstone.
Do you have instructions or recommendations for removing the broken and remaining pointing between the flagstones and replacing with concrete. Also, where the previous repair job left concrete on top of the flagstone, can that be ground down with a grinder or other process?