Determining whether a porcelain sculpture has been repainted requires a keen eye for detail and an understanding of ceramic artistry. Here are key indicators to help you spot repainting:

1. Inconsistent Gloss: Original porcelain typically has a uniform glaze. Repainted areas may appear duller or shinier than the surrounding surface due to modern materials.

2. Color Mismatch: Aged pigments naturally fade or oxidize. Fresh paint often stands out with brighter or unnatural hues, especially under UV light.

3. Brushstroke Irregularities: Hand-painted antiques show subtle, fluid strokes. Repainting may reveal clumsy overbrush marks or synthetic brush textures.

4. Crackling Discrepancies: Authentic crackling (craquelure) follows the glaze’s aging pattern. Repainted sections might lack cracks or show abrupt breaks in the pattern.

5. Texture Differences: Original surfaces feel smooth and integrated. Repainted spots can feel raised, gritty, or waxy due to layered additives.

For collectors, consulting a professional or using magnification tools can further verify suspicions. Always cross-check with historical production techniques to confirm authenticity.