can you tattoo over birthmarks

Anybody know any good tattoo / birthmark removal treatments?
I have two tattoos I want to be removed and a small dark brown birthmark I take the test with 100% TCA to remove them, but if there are suitable alternatives, which currently I am spending thousands of pounds I'd like to hear.
There are a lot of things that can help to fade, but removal of tattoos does not always work.
Birthmark – Akon






