You can but it's not necessary! The best trick for removing the skin from peaches is to score the bottom of the peaches (cut an X in the skin) and place 2-3 peaches at a time into a pot of boiling water. Leave them in the water for about 30 seconds to a minute, and then remove them to a bowl of ice water. The peach skin will be so easy to peel that you won't even need a knife!