Thats actually near enough the recipe for plastic model cement - that stuff is the appropriate solvent with polystyrene chips dissolved into it to give a substance that attacks the plastic and evaporates, leaving a welded plastic-plastic join with modest gap filling properties. Super on joins that don't have a big surface area, but not good for laminating sheets together. The plastic tends to be eaten by the solvent on its way out. I would expect the same from ABS. Mixing your own you should be able to decide and get to whatever consistency you want.
If I'd known you were comfortable messing with solvents.....................