Hello, I've been doing some research and getting conflicting information about wood conditioners made from mineral oils or petroleum distillates. These are often used on the fingerboards of guitars that are made of rosewood or ebony and don't have a finish applied. I have heard that mineral oil/petroleum will only coat the surface of the fingerboard and actually seal it over time, making any future application of oils difficult. As such some people recommend using a plant based oil saying it won't seal or clog the wood and will soak deeper into the wood keeping it from drying out. Can anyone confirm if there is any truth to these statements?