Tamanu Oil for Blepharitis and Melasma?

I came across some info on the internet about Tamanu Oil and that it can be used for conjunctivitis or blepharitis (I assume it’s because of its anti-bacterial, anti-microbial, anti-fungal properties). If so, should it be applied undiluted or diluted (with a Q-tip)? I also suffer from long-standing hyperpigmentation (uneven patches/streaks on my cheeks) on my cheeks and old acne scars which are more like shallow, irregular craters. Will tanamu oil help in filling in the indentations?