I'm not sure, but why not try a drop in an inconspicuous place?
I'd think you wouldn't need to rinse off, it would absorb into the skin.
Personally, I made a facial oil from jojoba oil (2 parts), rosehip oil (1 part) and some argan oil (1 part), plus a few drops of lavender to scent it. Seems to work fine for me. Ingredients were initially a bit pricey, but it'll last for ages, so overall not too bad. Disclaimer: not qualified or anything, just trying stuff to suit the facial Roseacea I have, needs to be free of many of those nasty chemicals used in so many products.
Back in the day my mum swore by breaking a vit e capsule and using on your face to help heal any scars. My dad got burnt on his face from the car and his face healed really well, no sign of any scars. Disclaimer - the burn was fairly superficial but looked bad at the time.