It’s important to remove masking tape at the right time. If you remove it when the paint is still wet, it can still spread into the areas that have been protected and ruin the end result. If you remove it once the paint has fully cured, the surface may be more brittle and chip as you remove the tape.
The best time to remove the masking tape is when the paint is dry to the touch but has not yet fully cured. This usually happens around an hour after you have painted. If it is still gummy, leave the tape in place for longer.