Enhance Car Fender Bump Texture Density

I have a high-resolution 3D scan of an automotive fender saved as a single STL. The surface carries a repeating bump pattern that I now need to appear twice as dense purely for visual impact, so dimensional accuracy of the overall part must stay intact while the micro-texture is refined for better aesthetics.

Because the source program is unknown, please feel free to use whichever workflow you prefer—Blender, ZBrush, MeshMixer, SolidWorks with ScanTo3D, or any mesh-editing suite that lets you control patterns without introducing artefacts or non-manifold geometry. The final deliverable is the updated STL ready for printing or rendering, fully watertight and at the same scale as the original scan.

I would like this turned around ASAP. Let me know if you need a short call to review the file before you begin, and include a brief note on how you plan to double the pattern frequency while preserving edge detail and curvature.