Notched trowel
thingiverse
These trowels are useful for the spreading of thickened epoxy, or similar materials like thin-set mortar. Teeth spacing on the edges (2 versions): 3mm/5mm and 3mm/5mm/6mm Also the 3/5/6 version is a little thinner to be more flexible Infill percentage likely doesn't matter much for such a thin part.
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