When it comes to cover-up tattoos, there are two main options: a cover-up or a touch-up/repair. The former option is most commonly used when you want the tattoo being covered up to become something totally different. A cover-up is almost always more expensive than a touch-up, repair, or the existing tattoo. Much work is required in the design and execution of a cover-up tattoo.
If your goal is simply to improve an existing tattoo with coverage of a faded spot or an addition of color, you may consider getting a touch-up instead of getting another whole design altogether. While this option will save money and time, it’s important that the artist understands what you’re trying to achieve—a touch-up should not affect the overall look or concept of your original piece!
It’s also important to have realistic expectations here; touch-ups aren’t miracles. Without redoing the entire tattoo, some areas may be older and faded, while others are fresh and bold. Talk with your tattoo artist about your goals and they can guide in the best direction!