Here's a trick I've used over the years. Take masking tape and tape off both sides of the white line spacer. It is better to tape the white line spacer outside its' edges, than inside. Try to keep the edges as parallel, close and even as possible to the white line. Then take a permanent and I mean PERMANENT BLACK MARKER. One of the best I have found is made by Stanley Tools for marking your tools with your name [Lowe's is where I got mine], but remember once its on...its' on!!! Then in one continuous smooth swipe, do one direction first, then the other half of the stock, starting at the top and meeting under the toe. HTH Jerry