For garments that are no longer very new (jeans, t-shirts, polo collars and shirts), I would like to find a technique to regenerate the color (dark) that has disappeared (light marks).
Either chemically (with a usual household product: vinegar/acetic acid, bicarbonate, others), physically (freeze cool, heat, steam, or not), or with a technical product for recoloring textiles (what advice do you have for migros products, or elsewhere).
thank you for your real-life experiences