No. With a single-write disk, the material is permanently altered by the high-power laser which burns in the data (different sized holes for zeros and ones). Once that's done, it's forever. Think of taking a knife and cutting hole in a piece of tinfoil. You're stuck with it.A rewritable disk uses a different technology. The metal inside can be either highly reflective or not, and the laser is used to melt and refreeze spots into either of those states, selectively.