How well do tattos do over scars?
That really depends on the scar tissue and the artist, but I have seen some very good results.
On that note 812 days since i last self harmed ^_^
The man who sold his back to an art dealer
Tim Steiner has an elaborate tattoo on his back that was designed by a famous artist and sold to a German art collector. When Steiner dies his skin will be framed - until then he spends his life sitting in galleries with his shirt off...
Novel? It was originally a short story.
https://www.roalddahlfans.com/dahls-work/short-stories/skin/
Made me think of Joan Greenwood