Hi, thank you for your email reply these pictures supplied you will never remove stains so large and so intense with the ink and stain remover.
The seats are so badly stained they will require restoration rather than an ink and stain removal solution
Sorry, we couldn't help you further with this but Carolynne did offer a solution to this in the form of a kit as the stains are so bad they would never be removable with an ink remover.
If we can help you further don't hesitate to contact we are more than happy to help you.
Richard.