oiling bark surface

I have a Ficus benjamina that has a pretty orange green striping color that is barely visible. I've heard that some oil the bark in order to enhance this coloration. I am tempted to utilize this technique, but curious if there are any drawbacks. First of all, is it safe, even If I painted the entire bark surface with a thin coat of vegetable oil? Also, I have heard that when oiling stones the appearance is temporarily enhanced but then a cloudy buildup occurs over time.
I assume I should keep the pure oil off of the leaves, but if it was safe this would seem like an easy way to rid the plant of any pesky mites as well.

Thanks,
David

Hello, in my cold climate in the winter, I use the liquid jin diluted in water to "oiling" the trunk of my Yamadori. Serves to disinfectant and makes the trunk very clean, I do not know if it works on the ficus or equatorial trees .

We use W-D40 of ficus nerifolias before we show them. It makes the bark a beautiful Purple color that is short lived. I do think it works like a neem type product.

Either way I would be EXTREEMLY careful putting oils on some tropical trees!

Mitch