Hello! Giving a faded leather sofa a new lease on life is a fantastic project. While one of the sources you provided wasn't relevant, the Reddit link points toward the general process that leathercrafters recommend. It's a job that requires patience, but the results can be stunning.
First, you need to determine what kind of leather you have, as this dictates the products you'll use. Most sofas are made from "finished" or sealed leather, which has a protective topcoat. You can test this by placing a single drop of water in a hidden spot. If the water beads up, it's finished leather. If it soaks in and darkens the leather, it's an unfinished or aniline leather, which requires a different process using penetrating dyes.
Assuming you have the more common finished leather, you are essentially refinishing the surface rather than dyeing the hide itself. The most crucial part of the entire process is the preparation. You have to start by cleaning the sofa thoroughly with a good leather cleaner to remove all dirt, body oils, and grime. After it's clean and dry, you must use a leather preparer and deglazer to strip off the original factory sealant. This step is non-negotiable, as it creates a surface that the new color can properly bond to. If you skip this, your new color will likely peel or rub off over time.
Once the old finish is removed, you can begin applying your color. For this, you should use a product specifically designed for leather upholstery, often called a leather paint, colorant, or balm. Apply the color in several very thin, even coats with a sponge or spray applicator, letting each layer dry completely before starting the next. Building up the color slowly prevents a thick, painted look and helps avoid cracking.
After you are happy with the color and it has fully cured, the final step is to apply a clear leather finisher or sealant. This protective topcoat locks in the color, protects it from wear and tear, and gives the sofa a nice sheen, whether you prefer matte, satin, or gloss. This also ensures the color won't transfer to your clothes. Always remember to test all your products on a small, hidden area of the sofa first to ensure you get the results you want
