06/12/2026
The 12-Inch Knife Trick for Flawless Bullnose Corners! 📐🛑
If you want smooth, professional results on outside bullnose corners, it all comes down to stepping up your knife size for the final skim coat.
In this phase, I’m trading my 8-inch fill knife for a massive 12-inch blade. Those extra four inches give you the leverage you need to stretch and blend the mud out wider, creating the optical illusion of a dead-flat wall.
I load up a hefty scoop of mud, lay out the pass as evenly as possible, and pull one long, steady stroke before burning the edge into the wall plane. Finally, just make a couple of smoothing passes and cleanly slice that excess buildup right off the bullnose radius. It looks satisfying, but more importantly, it saves you a ton of brutal sanding later!
📺 THIS IS THE LATEST PHASE OF THE RESTORATION SNEAK PEEK! The full long-form video drops soon on my YouTube channel, Walls, Explained. I’m breaking down my exact multi-angle blade work, the traps that will ruin your paint job, and the exact dollar amount I invoiced for this contract. Drop a like and follow to see the final reveal and the full project breakdown!