Some may already be happy with the results as-is. I personally thought the letters still looked too fat or heavy, so I went in with a rag and my finger tip to fine-tune. If you can't control your shaking hand, have another drink or skip this step. I suppose one could experiment with more layers of material on your block, creating a spongy effect, which would "reach into" the recesses a little deeper, but you risk blowing the whole thing this way.
Now stand back and admire that professional looking detailed grill. What was that, like about a half-hour? Sheesh, too easy!
Before and after