Manual Beard Color Retouch Needed

I have two JPEG portraits where the beard has turned noticeably white. I need that white facial hair meticulously recolored to a deep, natural-looking black while preserving every strand’s texture and keeping skin tones untouched. The finish must be high-detail retouching, so please work by hand in Photoshop (or your preferred pixel-level tool) without the aid of AI auto-colorizers Deliverables • Two high-resolution JPEGs matching the original dimensions, with the beard convincingly black and no artifacts or tell-tale edits. • A second set in PSD (layered) is welcome if it makes revisions easier. Acceptance Criteria • Each individual hair blends naturally with surrounding strands. • Skin, lip, and garment tones remain identical to the originals. • No halos, color bleeding, or blurring when viewed at 200%. • Metadata shows no AI software tags. Turnaround: as soon as you can comfortably achieve flawless quality—please let me know your estimate in your bid along with a brief note on the tools and steps you’ll use.