Grauer & Weil India Ltd. Manufactures Aqueous Neutral Cleaner. Grauer & Weil India Ltd. Is the manufacturer of polishing compounds, mops, fibre, wheels etc. Aqueous Neutral Cleaner is used as ultrasonic cleaner. Aqueous Neutral Cleaner, under brand name of Groclean MS, is suitable for removing polishing compounds, heavy soils from most metals including steel, copper; aluminium and zinc die cast components.