A customer asked for flame names and numbers on the back of thsirts, they don't like the flame names and want them covered with solid color vinyl. So will eco-film stick to quickprint? If not, any reccomendations?
As Butch asked, how many are you doing? If it is just a few would you be able to remove the graphic with a heat gun and apply the new over the residue? Charge the client of course for the extra time involved.
The Eco-Film will stick fine on top of the quick print. You shouldn't have any issues with durability. If you're completely covering, you should make the film names and numbers a bit bigger so you don't have any of the flame showing.