I'm a knife sharpener as well, and the first time I tried to hone my razor I ended up with the frowning blade. It's a thread in beginners that might have some good tips they helped me a lot. Biggest difference is how stupidly even your application of pressure has to be or it won't hone straight. Also, if you get waterstones and use them for both knives and razors be sure to flatten really well the knives seem to leave little scratches in the finer hones.