You can't get any lighter than white. Red oxide primer under all of Schwinn's paint colors. Prewar models are exempt though. Schwinn's advertising of a 4 coat paint job was definitely at the time the Opal candy colors came into play or even later. The solid color paints only had a 3 coat paint job since they did not have the aluminum silver base that was used on the candy colors.
1.Phosphoric acid dip coating
2. Red oxide primer dip
3. Aluminum reflective base coat, candy colors only
4. Color coat
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