>>3191563Generally grime art is done on someone beautiful or famous. That way the juxtaposition of the beauty/authority and slime is interesting. Judging your image without considering a grime art piece, it looks unfinished. Maybe if he had slime coming out of his mouth too, running down his beard. Or if his beard and hair was made of slime. Something like that would be more visually interesting.
On the other hand if your goal was just to make people feel uncomfortable, I suggest going with trypophobia. Always a classic!