Dieter Roth did some art Defacing too, read this interesting artnet article here.
The image above is of Dieter Roth by Arnulf Rainer and below from Dieter Roth.
Dieter Roth
Pablo
Pablo González-Trejo (b. 1973, Cuba) is a Paris-based artist exploring identity, memory, and entropy. His work has been exhibited globally and is held in collections worldwide.