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Am I the only one who tried a 12-inch knife on a ceiling and got a weird result?
I was doing a popcorn scrape job in a Phoenix condo last week. Grabbed my 12-inch taping knife to skim coat the ceiling after. It left these long, shallow grooves I couldn't get rid of. My buddy swears by a 6-inch for ceilings, says it gives you more control. I thought bigger was always better for smoothness. Anyone have a strong opinion on knife size for overhead work?
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angela_knight31mo ago
Wondering if the problem is more about the angle you can hold it at. Like @betty_kelly9 said, control is key overhead. Do you think the weight of that long blade makes your wrist tilt just enough to dig a corner in? I've found my arm gets tired faster with a big knife up high, and that's when the bad strokes happen.
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Your buddy is right about the six-inch giving more control. My friend's helper tried a big knife on a vaulted ceiling and ended up with the same weird grooves you described. He had to go back over the whole thing with a smaller blade to fix it.
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