Yea, the typewriter stuff. I changed an engine on a Nexstar and had to cut a piece of the balsa for the muffler to fit. A friend of mine saw the cut and suggested to put whiteout on the cut portion to fuel proof it and match the white covering. So I thought what the heck, if I can use whiteout on the cheek, I could use it on the crack. But you are right, the k2r lightened the wood and you can't see the crack through the covering.