Hope you priced well
A case of box of cotton buds couple white towels ,apply pog with buds absorb with towel ,
May take couple of hours or so, don't know where all the ink comes from you will find your towels covered in the stuff, so price well .
That has always been my approach if they are willing to pay, eventualy it will come out , what damage that may be done to that fabric , I don't know , just clarify with custy possible damage.
Geoff