Writing on the back can cause the paint to flake off ont the front of the canvas, wetting of the canvas from the application of labels can cause cracks, and any sharp blow will inevitably leave its mark even if it does not rupture the canvas. Beyond conscientious care and careful handling of your paintings, there is little you can do to prevent natural aging. Paintings conservators can aid in preserving you paintings for the greatest time. Paintings conservators are professionally trained individuals with years of experience. You should solicit the advice of services of a conservator any time that you have questions of concerns regarding a painting.
Conservators are committed to the preservation of the original artwork.
They will do everything in their power to regain and preserve the artist's original intent. They will not alter or modify a painting to indulge an individual's personal taste. The goal of a paintings conservator is the preservation of cultural heritage.