Clean new galvanized metal surfaces with a water based cleaner/degreaser to remove any oil or and contaminants. Once the metal has dried, dampen a cloth with white vinegar and wipe the surface down. The acid in the vinegar will act to etch the metal and help the paint adhere. Sheet Metal/HVAC Pro provides instant solutions in dimensional format for Right Triangle problems for sheet metal problems. A Right Triangle is calculated simply by entering two of four variables: 1) (Run) 2) (Rise) 3) (Diagonal, or Hypotenuse); or 4) (Theta/Pitch). To my knowlege almost all the metal prep. solutions "usually" contain phosphoric acid, an alcohol or two, and usually some type of ether. Although vinegar is an acid too it just isn't that strong. In fact it is a safe cleaner for most clear coat lacquers used in the furniture and wooden flooring industry. Metal, wood, fiberglass, we work it all... Aug 12, 2019 · Proper Sheetmetal Prep is the Foundation to Getting Great Paint Proper Sheetmetal Prep is the Foundation to Getting Great Paint Getting perfect paint has never been for the faint of heart. There's... The completion of the Certified SOLIDWORKS Professional Advanced Sheet Metal (CSWPA-SM) exam shows that you have successfully demonstrated your ability to use SOLIDWORKS Sheet Metal tools. Employers can be confident that an individual with this certification understands the set of SOLIDWORKS tools that aid in the design of sheet metal components.