So all of your hair is currently relaxed, correct?
According to
this post, no, there is no known way to "close" the cuticle. Your best bet is probably protein treatments I would think, since that might fill in the gaps temporarily. Also as someone said, silicones will make the damage appear lessened and will help protect it.
Your hair might be able to handle relaxing long enough to be WL, maybe. I think it really varies from individual to individual.
If you do decide to go natural, I think your hair type sounds similar to Teri LaFlesh's of
tightlycurly, and maybe incorporating some of her techniques would help with detangling. My sister has incredibly tight, thick, 4b curls that took hours to detangle until we started leaving all the conditioner in and using a denman brush instead.
Good luck!
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