Sentence:  I'm not a good painter; I'm a <WSD>dauber</WSD> who can get a good likeness. Van Gogh or Cézanne would never have made it; I was given a bottle of Beaujolais and a set of directions. 
Meaning of the word marked with <WSD> tags:  One who, or that which, daubs; especially, a coarse, unskillful painter.