email@example.com wrote:I found that the bottom of my flow slab has picked up a lot of kiln wash (Hotline Primo Primer) and I'm having a difficult time removing it all. Part 3 of the flow slab video shows a slab being cleaned by rubbing it on some kind of abrasive surface but it's hard to see just what that abrasive material is. Is the actual surface of the sanding area abrasive or is there some kind of loose abrasive grit paste being used? Can someone clarify this?
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