Just thought I'd add my experience with mottles to this discussion....... I have never, I repeat never, been able to get a decent mottle with brown dye!!! Not with liquid, not with chips, not with dye block. I have no idea why, and I'm sure there is no real scientific reason, but there has never been a good brown mottle in my house. I also tried the remelting thing, and sometimes it improved the look, but nothing that I would dare claim as my own! Here is a sample of my brown mottle - and this is one of the better ones....... reminds me of something I only saw when my kids were babies