Susan Joyce from across the ditch shared this great tip on saving the life of your blades when cutting Whisper White:
When cutting Whisper White cardstock. If the card is rough on the edges when cut, place a sheet of A4 photocoping paper just underneath the card at the cutting point and the Whisper White will cut nicely and the photocoping paper will be ragged. It also saves the life of your cutting blade. I have tried the tip and it works beautifully, especially if you have a slightly crooked piece of card or you only need to remove a smidgen to straighten or trim.