Definitely that coconut oil soak pre-bleach is somewhat protective, and you need to be pretty heavy-handed with the oil.

Also, use some hydrolyzed protein treatments (always followed by moisturizing treatments, with humectans and occlusives) around your bleaching session: Aphogee 2-step and Joico K-Pak are very good reconstructors but there are many others on the market, of course. If you are a DIY kind of person, gelatin treatments could be useful, too: http://science-yhairblog.blogspot.ca...pe-update.html

Overall, bleached hair tends to respond well to hydrolyzed proteins, penetrating oils, silicones, ceramides - luckily, those are usually star ingredients in conditioners/masks for damaged/chemically processed hair.

Also, you might want to research products that are designed to limit damage during chemical processing, e.g. Olaplex. I have no experience with it, but there are some LHC-ers that reported very good results with it: http://forums.longhaircommunity.com/...d.php?t=124721.