I own a laser tattoo removal business, http://www.gotattooremoval.com
wrecking ball, heat treatments, skin ripping/overlaying, and using a laser to etch it out.
Wrecking ball and other topical solutions don't work. Not familiar with "heat treatments". Farrell is currently undergoing skin surgery to remove the tattoos on his arms, where they sample your skin and grow more and cut / sew / replace - that's by far the most painful and the most invasive & most expensive btw... and a laser doesn't "etch" the pigment out. Lasers don't even "remove" the tattoo, the beam of light targets pigment and fragments it down to a size the body's immune system can start to dispose of it. Basically, it's a way to facilitate the body to "remove" the pigment for you, since tattoo pigment itself is inert.
There's a pretty extensive FAQ on the company website, feel free to ask if you have specific questions, I can't answer all of them for insurance reasons, but I can advise and what not.