Do tons and tons of research on the UV ink. It is not a stable ink, meaning it will fade and be 'destroyed' by your body faster than other inks that are visual. Most UV inks are also not invisible, and contain some tint to them. They are an amazing thing, and something I researched as well, but after talking to dozens of tattoo artists (ones heavily in the field, not just casual people), many would advise against the UV inks. They require so much ink to get a solid glow, and even then, it gets easily destroyed over time.
Tons and tons of research on that one. They might have made improvements over the years, but I wouldn't treat it as an 'invisible' tattoo just yet. Especially with your mention of scarring. On a chest or any delicate skin? There's a good chance of that happening![]()