Cleaning an Oil PaintingBright Light Fine Art
“Over time, a beautiful art collection can lose some of its visual impact due to dust, cobwebs, dirt, water stains and other wear and tear. Fortunately, there are a strategies for cleaning paintings on canvas that will not damage the paint and will keep an art collection looking its best.”
One article on how to clean a painting is here. http://www.ehow.com/how_4762005_clean-canvas-paintings.html
This video explains a safe way to clean an oil painting. David and Sherrie have safely used soap and water to clean a painting as well.
This YouTube video explains how the museums clean oil paintings. If the painting you want to clean needs professional cleaning, seek a professional. Contact a museum near you.