PDF Background Removal for Few Files

I have up to five high-resolution PNG files (not original PDFs or layered sources) that require professional cleanup for print-ready use.
For each file, please:

Remove the existing background completely and cleanly (make it fully transparent or pure white—whichever ensures the best print results without artifacts).
Preserve every detail of the visible foreground content with zero loss: no blurring, no compression artifacts, full text legibility, and maximum sharpness for images/graphics.
Replace the current watermarked logo with a new logo I will provide (I'll supply the replacement logo as a separate PNG with transparency).

Since these are flattened PNGs without original files/layers, I need someone experienced in pixel-perfect editing on platforms like Adobe Photoshop, Affinity Photo, GIMP, or similar raster editors who can:

Use precise selection tools (magic wand, pen tool, subject select, channels, or AI-assisted removal if accurate).
Manually/inpaint/refine edges around text, fine details, and complex shapes to avoid halos or cutouts.
Recompose the cleaned content on a transparent or white background.
Export as high-quality, print-ready PDF (same dimensions/resolution as original PNG, 300 DPI or higher, no downsampling, CMYK if needed for print, or RGB with profile preserved).

Deliverables:

Final print-ready PDF for each file (background removed, logo replaced, all content 100% preserved and sharp).
(Optional but appreciated) The intermediate cleaned PNG with transparent background for future flexibility.

This should be straightforward for an experienced photo editor/retoucher. Please outline your exact workflow (tools + key steps) so I can confirm it will maintain quality without introducing artifacts.
Quick turnaround preferred—let me know your estimated time per file (or for all five) once I share samples/files. If this matches your expertise, I'm ready to send the first PNG right away for a test/edit quote.
Thanks!

This version is concise yet detailed, highlights the PNG nature and lack of originals (so freelancers understand manual editing is needed), emphasizes quality for print, and clearly separates background removal from logo replacement. It invites responses with workflow details to filter capable providers. Feel free to tweak any specifics (e.g., add budget, deadline, or number of files) before posting. Good luck!1.2s40 sourcesmake sure yu add the fact i want to add a new watermakr logoHere’s the updated and rewritten version of your freelance request/post, now clearly emphasizing that you want to add a new watermark logo (replacing the existing watermarked one). I've kept it professional, detailed, and suitable for platforms like Upwork, Fiverr, Reddit (r/forhire, r/slavelabour, etc.), or similar.

I have up to five high-resolution PNG files (flattened, no original layered/PSD/AI files available) that need professional cleanup and logo replacement to make them print-ready.
Required work for each file:

Completely remove the existing background in a clean, precise way (deliver with fully transparent background or pure white — whichever gives the cleanest print result with no halos, fringes, or artifacts).
Preserve 100% of the visible foreground content without any quality loss: sharp text, crisp edges, full detail in graphics/images, no blurring, no compression artifacts, no softening.
Replace the current watermarked logo with a new watermark/logo that I will provide (supplied separately as a transparent PNG). The new logo should be placed in approximately the same position/size/scale as the old one (or I can specify exact placement if needed), and blended naturally if the design requires it (e.g., opacity, drop shadow, etc. to match style).
Since these are flattened PNGs, this requires skilled manual editing — not just simple auto-removal.

Preferred tools/skills:
Adobe Photoshop, Affinity Photo, GIMP, or similar raster editors. Experience with:

Precise selections (Pen tool, Select Subject, Channels, Refine Edge/Select & Mask)
Background removal on complex subjects (text, fine details, hair-like edges, shadows)
Inpainting/healing/cloning where needed to clean up remnants
Accurate logo replacement & compositing

Deliverables per file:

Final print-ready PDF
→ Same page dimensions & resolution as the original PNG
→ 300 DPI (or higher if original is)
→ No downsampling or compression artifacts
→ RGB or CMYK color profile (please confirm which you recommend for my use case)
→ Background removed, new watermark/logo added, all content razor-sharp
(Optional but very welcome): Cleaned transparent PNG version (background removed, new logo already added) for future flexibility

Please reply with:

Your exact workflow/steps (tools + main techniques) so I can confirm quality preservation
Estimated time per file (or for a batch of 5)
Your rate (per file or package for all)