I put a bench seat protector under my kids car seats. When I took the seats out to clean I realized the seat protector had stained the white seats from the dye in it. I have tried:
Mothers VLR
Griots Leather care
Diluted bleach
Magic Eraser
Folex Stain Remover
3M Marine Vinyl Cleaner
Meguiars M5716SP Marine Cleaner
By far the most effective was the 3M. However none completely removed the stains. They remain a very light purplish shadow on the seats (the protector was black with a high traction vinyl/rubber backing to prevent slipping.
How is that for annoying, your seat protector stains your seats
