NO MESS NO BROKEN BARS NO WASTE. Push up cardboard tube exposes only the amount you need. Plastic Compound: Use on hard plastics. Metal Used On: Not for use on metal. Use on hard plastics. Do not use on soft or low melting temperature plastics such as polyethylene. Results: Produces a smooth, even finish. Type of Buffs: Loose muslin, chamois or cotton flannel. Grobet "Push Up" tubes contain approximately 3-4oz. of polishing compound.