Can 5-gal. pails of cleaning fluid (Agitene, Aquatene or Biotene) ship via UPS or FedEx? Can I return unused pails or drums of cleaning fluid that have never been opened? Can I use petroleum-based solvents in a heated Graymills parts washer? Does Graymills carry or make ultrasonic parts washers? Is the Graymills model DM drum-mounted parts washer available without the drum? What determines the type of parts washer I should buy? What if the difference between Graymills Agitene cleaning fluid and other solvents on the market? What is the difference between Super Agitene and Regular Agitene? What's the difference between Super Agitene and Super Agitene 141? more ...