Turp, alcohol, mineral spirits, lavender oil can all be used to disperse lusters.. up to a point.. Once the lusters start to dry, the only thing
that will reliquify the lusters and make them fluid again is dispersing fluid... so if you use any of the other things mentioned above, you haveto work quickly because lusters dry quickly.
Getting сhina unglued of a frame, etc depends on what glue was used. Start by placing glued items into hot water and wait until cool
enough to handle. Or put item in cold water in a pot, slowly bring the water to a boil on the stove and use long tweezers to gently test if glue is softening. Usually that will easily soften the glue. If it is epoxy, the sustained oven heat can work (250F).