nail polish on wood?

So here's the story: I bought my acoustic guitar off ebay and there's a sort of butterfly border around the sound hole. (Needless to say but I will anyway- I don't like it.) It's painted on, not a sticker or anything. I was thinking about taking a permanent marker and just filling it in, but then I just read about using black nail polish. Do you think that would work better? I'd be afraid that it would soak into the wood.

Also, I haven't been to the site in a while and I have to say I love what you've done with the place.