3/4 Bullnose Cleaning Tool
thingiverse
This tool is very similar to Trim-Tex's 3/4 Bullnose Cleaning Tool. I can't buy these locally so I made my own version that is printable. First test seems like the tool works very well, but is definitely a wear part, so maybe print a few. Tool can be printed flat side down, then print handle with the locating pins up (any printer should be able to handle 45° chamfers without supports. Use superglue to attach handle to tool.
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