In this case, the contractor was removing thinset on some jobs and several coats of epoxy with quartz on others. The important detail is that tungsten wear bars were not aggressive enough for the work.
For this kind of removal, Lavina clockwise PCD is usually the cleaner first step. PCD bites into thinset, glue, mastic, and quartz-broadcast epoxy more aggressively than scraper-style wear bars. Direction still matters: the tool direction should match the grinder rotation so the machine tracks more smoothly and the operator keeps better control.
Use this setup when the job needs stronger removal, not when the goal is fine grinding or polishing.
For product selection, start with Lavina diamond grinder tools when the machine setup is confirmed. Use PCD coating removal tools when tungsten wear bars are not aggressive enough for thinset, glue, mastic, or quartz epoxy. After removal, switch to metal bond grinding tools to clean the scratch pattern and prepare the surface for the next stage.
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