Monti RTN

[Haloreef]

I have had luck doing the "frag and dip" also. However I add one more step. I use the cyano acrilate glue on the fresh edge to make sure I trap any unwanted nasties inside the glue. Make sure you cover the whole edge.
I can't say it's worked every time but, it has worked more often than not for me. Sounds like you have nothing to loose.
Good luck.