Three-Zone Paint Test Tile with Recipe Label Area - STL and Editable Source

Original three-zone paint test tile for miniature hobby painting: compare one paint/primer recipe on a flat pad, convex rib and rounded recess field, then record the recipe in a separate blank identity area. A single FDM-printable piece without magnets, bottle fittings or assembly. Overall 72 x 45 x 8.6 mm. Digital STL, editable Blender mesh and portable Blender generator included. AI-assisted original design. Geometry and generic Cura slicing checked; physical printing and paint adhesion are u…

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