Caswell Tinning SolutionHighly recommended when plating over conductive paints. Resolves a mutlitude of problems including patchy plating and eliminates the need for multiple connecting wires to the part.Adds a conductive coat for high quality electroforming. For better results when using any conductive coating, dip parts in solution for 60 seconds, then plate with Acid Copper. Use solution at room temperature. No rectifier or power source required. Corrosive Liquid.Contains Hazardous Goods. Shipping restrictions apply. Ground shipping only to the Continental USA.