Nolan, thank you, I am glad I was able to hide those lines I caused with the knife. What I tried was tape that I could see through, but certainly will use a low tack tape as you described the next time I try this technique.
Bill, thank you, I use masking fluid as well but wanted to try the tape technique for a large area. It really is a great technique as long as you are careful with the knife and the tape doesn't rip the paper. I should have done a test first.