While painting, if you have stained your hands with oil paint, it is not easily washable with water and soap. Instead apply a little baby oil and wash, there will be no sign of paint and your hands will be smooth without any roughness of the paint.
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Because of the long wearing factor of oil based paint, I hardly ever use anything else but clean up is a little messy. So if I have to stop in the middle of my project, I just put my brush in a container of water, until I am ready to use it next time.