The situation you describe is becoming increasingly popular. It seems designers and architects are mixing different finishes together making it very difficult to restore the polished portion. The only way to restore the polished granite without touching the flamed is to use a hand polisher equipment with a 3-5 inch drive pad. I would tape the edges of the flamed granite with duct tape. If it is possible, try to place a 2x4 even with the polished granite covering the flamed granite. You are creating an artificial edge. You may need to construct braces so the 2x4 stays in place.
Article ID: 512
Created: January 20, 2022
Last Updated: January 20, 2022
Author: Pam Freitag
Online URL: https://sr-manual.com/kb/article/i-have-to-polish-a-narrow-strip-of-granite-that-runs-as-a-border-along-side-a-strip-of-flamed-granite-the-polished-granite-strips-are-about-six-inches-wide-how-do-i-hone-the-polished-granite-without-honing-the-flamed-granite-512.html