Watch the Twist & Slice online guitar lesson by Muriel Anderson from 50 Right-Hand Techniques You Must Know

Christopher Parkening uses this technique extensively, which he calls "slicing," to bring out melody notes. Andres Segovia also used this technique as part of his huge palate of tone. I'll give you the example piece, a really easy version of "Romanza," one of the most popular Spanish guitar pieces.

Try it with rest stroke on the melody notes, and then with the slicing technique on some of the melody notes.