Museo Nacional de Costa Rica
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Tomato and onion to clean artwork?

Is it good?

There is a popular belief that applying tomato or onion slices on the surface of a painting helps the cleaning and maintenance of the piece of art.

The effect of such food may be counterproductive, since they may attract insects and other organisms that will ruin the piece quickly.

If your pieces are stained, darkened or dirty, the right thing to do is to ask a specialist on conservation and restoring to give you an accurate solution according to the case and the kind of piece.