Electrolysis and laser can change the color of an existing tattoo. In fact, certain lasers can change some pigments of tattoos into completely different colors. This is especially true of certain pinks and reds, which can turn dark black when hit with a laser. A couple of women with permanent lip liner learned this one the hard way.
You can certainly get electrolysis or laser in an area before getting a tattoo. In fact, many people get tattoos over scars, so it's not an issue that the pigment won't take or anything. You probably shouldn't get a tattoo until you are done with laser or electrolysis, but there's nothing stopping you from doing both. I'd get the hair removed first, though.
[ July 28, 2002, 12:40 AM: Message edited by: Andrea ]