I have relaxed 3c/4a hair.  I used the coconut milk, 1 egg, and avocado mix (1 tablespoon of olive oil & 4 tablespoons of water) on my hair.  My hair came out shiny and a little tangled.  But I didn't have a blender so there where tiny chunks of avocado that I had to make sure came out.   

But the benefits were fantastic.  My hair was def stronger.  I think I will try the coconut milk with conditioner next time.

I've used coconut milk in the past and have had nothing but bad luck with it.

My hair became a tangled me after using it.  My relaxed hair hated it but my natural hair loved it...I was stretching out my relaxers then.  But now that I am hearing that you can do other things with it I might just give it another try.

In Indonesia olden times, in Jamu (Indonesian beauty rituals), they use thick coconut milk (should be from old coconuts) for washing and massaging hair. Lighter coconut milks (from middle ag coconuts) were used for rinsing but not deep conditioning. Of course, they have access to the fresh stuff. I'm not sur how effective those packaged coconut milks are. Just thought it would be an interesting piece of information :)

For deep conditioning, thay use asian nuts and plants but I doubt you can get it easily in US.

PS. An alternative to coconut is hibiscus leaves. Boil them in water, then strain the mixture. The remaining gel can be used as a shampoo. Watch out for pesticides though.