This is not necessarily an issue but it does depend on what sort of modeling you want to do. Many types of fashion spreads have models that do have tattoos. In some cases, these ads want models with an edgy look. Also, if the tattoos are small enough, they can easily be covered up. However if you want to be a catwalk model or high fashion, this could be a problem. Most fashion designer to not want their clothes to compete with tattoos. For high fashion, tattoos really do not send the right image when displaying high quality clothes.