So I picked up a standard gauge prewar blue comet set yesterday. The set is in pretty nice shape but has some layers of caked up dust. I been using a soft bristle brush to take off the top layer of dust but the last layer is a bit sticky. I am tempted to take a damp rag to it but I fear taking off any paint, I dont want the paint to loose any of its richness in color. What would be my best bet?
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