There's a great, potentially apocryphal story of Richard Feynman learning to draw at the age of 44. He met an artist at a party, and got into a debate about the nature of human expression. He argued that science was greater than art because it required the composition of a scientist's ingenuity as well as a deep understanding of nature. The artist fought back, reasoning that art was superior as it did not rely on nature's own inherent beauty to produce something unique.
In any case they ended up agreeing to tutor each other, Feynman would study art and he would teach his new friend Physics. His initial sketches were pretty terrible. However, he stuck with it for the rest of his life, he was never amazing, but he ended up producing quite lovely pieces.
The point isn't so much that practice made him perfect, but it certainly made him better.
