Seeing this I feel an old rage boiling up again... I had a similar experience during LPL and nearly chucked the workbench out the window and set the house on fire.
If you have a good way of sponging off the topcoat without damaging the paintwork beneath too much I am interested to hear how you do it.
(By the way, that's an Obelisk mini, innit? I recall fondly how Grimm used him as the key character 'the Teacher' @ GLAM. A bit ironic that it was in matakishi's interest to kill him.)