Smokeless powder art.
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Previously:
https://www.homemadetools.net/forum/...4729#post80452
https://www.homemadetools.net/forum/...385#post181497
https://www.homemadetools.net/forum/...291#post181081
https://www.homemadetools.net/forum/...124#post165067
https://www.homemadetools.net/forum/...769#post156005