Oil paint can be messy. If cleanup is put off, it gets harder and harder (and can even ruin your paint brushes).

Following is a transcript of the video. Narrator: Oil paint is simple. At its most basic, it's just a mixture of oil and pigment. But depending on the color and quality, a liter of this paint ...

while oil-based paint might stretch to 15 years; however, once you notice a thick layer of film on top, a foul odor, or the liquid paint refusing to mix back to its original consistency ...