Have you ever tried to take the rust off with your bare hands? It's a nightmare. You brush, you rub, you curse in your heart. Then the rust turns round and tells the boss, Nice try, boss. And that is the frustration of most of the Malaysian factories. Old tanks that are rusted, peeling paint, greasy equipment-- they all are time- and money-wasters. You have one to-day and peels off the following week. The problem? Poor surface prep. That's where sand blasting  steps in. And w