If you use a cushion wad made of plastic, there is no need of one made of paper. You can wrap the plastic wad with paper, cutting slits to correspond with the slits in the plastic, to protect your bore from plastic crud building in the barrel. There are good solvents that will take that right out of a barrel, particularly if it is chrome lined, but if you don't put the plastic in there in the first place, you don't have to use the solvents, and bore brushes to get it out.