Hey Dustin. When you say melanated skin, it depends how dark you're talking. Normally the darker the skin, the more I up the contrast on the design. If its only slightly darker not normally any issue, but if its a realistic design like this it needs to read well. As Karl mentioned numbing cream can make the skin swell a little. You can still tattoo it, but it can feel a little sponge in some cases. I try to avoid offering it, but if someone wants it I let them, along as they use a good brand like Zensa. Some brands have extra chemicals that are not great for the skin. Just clean it off really well before you put on your stencil. Then be conscious of your first tattoo strokes & get a feel for the skin. Take your time to try & get your edges nice & clean in this one! And it can vary how long it lasts from an around 1-4 hours from my experience. Different results for different clients. Some like it, some don't!