Photorealistic Metal Scratch Retouch

I have several high-resolution product shots and need a meticulous Photoshop specialist to introduce a single, believable scratch on a metal surface. The edit must be indistinguishable from reality: grain, reflections, specular highlights, micro-texture, shadows—everything already in the file has to stay exactly as captured, only the defect itself appears.

Alongside the scratch, I may ask for small object removals or an extra graphic element to be composited in, so confident layer-based workflow and non-destructive retouching are essential. Please deliver:

• A layered PSD showing your work (scratch on its own layer, any removals or additions on separate layers).
• A flattened, print-ready JPEG/TIFF in the original resolution.

When you reply, include at least one before/after example that demonstrates photorealistic surface manipulation—ideally on metal—or other work where you combined object removal and illustrative additions while preserving all lighting cues. Clarity, realism and clean craftsmanship will be the criteria I use to approve the final file.