if it was baked, then 72 hours will be ok.Any continuing outgassing at this point will work it's way through the vinyl.
if it wasnt baked than wait atleast 2 weeks, 30 days is better.You COULD still put them on after a couple a days unbaked and you may or may not have minor outgassing bubbles under your vinyl,
but the real reason to wait is for what happens later. The escaping solvents could ruin the long term adhesion, or the graphic could become permanently embedded in the paint and you wont ever be able to replace it without repainting.
