You need to remove leather shoe dye if you plan on re-dying or painting your leather shoes.<br> You can use a deglazer that contains acetone or you can use pure acetone. Acetone is harmful to breathe and will eat at the leather if not applied properly, but it is an effective product for removing leather dye from shoes.
Stain. I have tried using acetone, and have tried going over it
Redying shoes - Changing the colour of leather shoes - Learn DIY
How to Clean Elastic Straps on Shoes
Ways to Get Scuff Marks Off of Converses
Shoe Shine: Alcohol Damage Restoration – Fumu
How To Dye Leather Shoes / DIY - FAIIINT
How to Remove Leather Shoe Dye With Acetone
Instant polish + acetone : r/DrMartens
A Guide To Dyeing Your Own Shoes - The Shoe Snob