Looking into buying the white OR black satin mini. My question is does the white color get stained or "greyish" looking if you ever handle it with dirty hands? Is it easy to wash off or does it actually stain? I worry about this mostly due to the satin or matte finish on it. My other question is whether or not the satin finish takes a jwrap well. It just seems that a jwrap would not stick as well to a satin finish as opposed to a stainless steel one. Thanks in advance for the answers!