Watch the Right Hand Approach & Muting online guitar lesson by Lee Roy Parnell from Slide Guitar Slinger
Here we'll talk about right hand technique and muting. I had no idea what I was doing when I started playing guitar this way, and then someone told me I was using a right hand banjo technique. At first, I was muting behind the strings with my left hand — and I still might do that a little bit, but you can mute with your right hand much more effectively by playing with your fingers and resting them on the adjacent strings. This completely gets rid of the string rattle and cleans things up.
Something I get asked a lot is about my nails on my right hand, and why I don't use a pick, etc. What I find is that by playing with glass on your left hand and plastic on your right, you become completely divorced from the instrument. There's no human touch at all. By using my nails (with one acrylic nail added on) I'm able to get a more tactile sound.