Oil is applied to the surface to prevent rust. Before use, wipe off the oil with a solvent or tool cleaner. Leaving it exposed to moisture may cause rust, so after use, wipe off any moisture thoroughly and dry it before storing.
Buyer comments
It comes with a simple memory which is surprisingly convenient. It can be used as a guide when diluting or mixing paint in containers that do not have markings. Also, while the part that is shaped like an earpick is often prone to breaking, this one is made to be thick so it is quite durable. The color mixing stick can be used as a mixing stick, but it is also a very useful tool for creating painted expressions such as sputtering and scratching, so it is surprisingly useful to have one!