we recently had a client bring in a chinese ancestor portrait. it was damaged in a fire, so it's in bad physical shape and has bits of plaster and other grime on the surface, as well as lots of water staining. the fabric around the portrait has suffered a lot of loss, and the silk is punctured and lifted away from the paper in some areas. yesterday i vacuumed and dry cleaned it, and tried to get some of the plaster off the surface...which will be easier to do once it is flat. next we will humidify and flatten it, clean it again, and then do mending and inpainting.