The Putty Knife Mistake That Ruins Your Walls @TheFunnyCarpenter
The Putty Knife Mistake That Ruins Your Walls @TheFunnyCarpenter
Uploaded November 2025 | Updated September 2026, 8 hours ago
Ever wonder why your putty knife leaves black marks or gouges your walls?
It’s those sharp edges! I will show you how pros “condition” their knives with a quick sandpaper trick that saves your walls (and your sanity).

🛠️ Tools used: 220 grit sandpaper, standard putty knife

#DIY #PuttyKnife #Drywall #FunnyCarpenter #HomeImprovement #ProTips
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The Putty Knife Mistake That Ruins Your Walls

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