From my own experience, someone gave me a shoulder bag for me to ' cut up' and use the leather. Too good to cut up, but the brown-ish colours were all over the place like its been out in the sun , so, I went about dying it. I cleaned it using a solvent etc. tried dying it dk brown...it came out blotchy and patchy , it was crap . I nearly threw it out, but , I am later going to try dying it black . Black seems to cover all sorts 'stuff'. So what I'm going to try is dye it black, let dry over night and give it another coat. If it works, I'll seal it, if it doesn't then I'll cut it up and use the leather
HS