What’s the toughest floor you’ve ever had to polish?

[Minh Quý Phạm]

"We’ve all been there—a slab that just won’t take a shine, or mysterious 'ghosting' after densifying. Let’s share our war stories! What was the most challenging floor you’ve ever worked on, and what trick did you use to fix the issue? Sometimes the best lessons come from our toughest projects."