I recently moved into a home where the previous owners splashed baby oil on the walls in several areas in my bathroom. Some areas are good sized stains. I tried painting over the stains with an oil based Kilz and waited several day to make sure it was good and dry. I then repainted the walls. Well, after approximately one week, the stain bled through the Kilz and paint. I did this process twice and both times, it bled through. Does anyone know of a solution aside from resheetrocking my walls??? Thanks so much!