NO MESS NO BROKEN BARS NO WASTE. Push up cardboard tube exposes only the amount you need. Tripoli: This silica-free tripoli is a fine cutting abrasive usually used an a pre-polish for finer rouges. Metal Used On: Use on all metals where rouge would be used a s the final finish (i.e. silver, gold, bass, copper, platinum, etc). Results: Produces a scratch-free, dull finish. This even finish is needed as the base for final polishing steps. Type of Buffs: Treated or tight muslin buffs or medium to hard felt. Grobet "Push Up" tubes contain approximately 3-4oz. of polishing compound.