changing interior colors

Pep Boys has sold a vinyl dye. Works good on plastic and seats.
But I have found you only want to dye the seats dark color to dark color.
And light color to light color seats.
It does come off sometimes and looks bad otherwise.
It smells like it would be a really not good chemical to breath.
Worse than paint.
So have a resperator.
Be sure and degrease things.