I would like to ask about sanding a painting surface. I am working on a painting in which some dust was caught in the wet paint. As it is in the dark shadow part of the composition, it’s more than visible, it looks pretty bad. I’d like to sand the surface to get rid of the junk so I can repaint the section that needs help. I don’t want to ruin anything nearby that is in good shape. I worry about the edges of sandpaper touching the surface and making a mark in the good area.
I was thinking that perhaps I could make a pouche of some type of cloth and fine grit emery so I could have better control of the area to be sanded. I could make one maybe the size of my fingernail.
I’d be interested in what kind of cloth… several layers of cheesecloth? Maybe that mesh is too open? And the fineness of emery? Where could I get emery powder?
Would the powder stick in the dry paint creating more problems?