Next I had to determine where the numbers would look good. There is a crack/line in the middle of this lid, so I had to think through what part of the numbers would look OK going across it or not.
Then I taped the paper to the lid and traced inside the numbers with a pencil. You can see the traced numbers in the following picture:
Using black craft paint that I bought in America, I carefully painted the edges of each number with a tiny brush before filling in the middle with a larger brush. It reminded me of "cutting in" that we do when painting a wall near the trim. The small parts of the numbers became a little thicker than the original. It was not an easy or quick task with all the texture of the lid, but well worth the effort. Don't look too close or you can tell it's handpainted!
It's new location in our home (along with the Tinker Toys!):