Surface cleaning is the careful removal of dust, dirt, grime and deposits from the surface of an object without disturbing its original finish, patina or decoration. It is usually the first and least invasive stage of any conservation treatment, and it can often transform the appearance of a piece without any further intervention.
The guiding principle is to begin with the gentlest method and progress only as far as necessary. Dry techniques come first: soft brushes, lint-free cloths, smoke sponges and low-powered vacuuming through a protective screen. If more is needed, mild solutions applied sparingly with cotton swabs may be tested on an inconspicuous area before wider use. Different materials need different approaches; gilded surfaces, painted furniture, textiles, ceramics and metalwork can all be damaged by water, solvents or abrasives that are safe elsewhere, and some gilding will dissolve with a damp cloth. Over-cleaning can strip the accumulated patina that collectors value, so it is better to leave a little dirt than remove original material. For important pieces, fragile finishes or any doubt about the materials involved, cleaning should be entrusted to a trained conservator.
