The talc might work. Applying it from the underside of the denim. Otherwise, you could try dry cleaning fluid - perchloroethylene aka 'perc', which is a common solvent in spray-on stain removers. Lay the splashed part of the jeans face down on some paper towels. Spray or dab the solvent on the back of the stain. Wait till it drys. It typically becomes a white power - which you then brush off. Then repeat if necessary.
1/20/09 at 7:57am