12/10/17
Repeat customer Billy B. told me a while back that he had an old Coca-Cola sign and wanted me to see if I could do anything with it. It measured almost 12" x24" and was, as you can see, made from a galvanized sheet of metal. For some odd reason, only the white lettering was peeling off, but was painted over the red background.
Galvanized sheet metal is a lot like aluminum as far as trying to paint directly on it. Without proper preparation, in time, the paint will peel off.
The first thing I did was brush on a coating of MEK - some wickedly strong solvent and scraped it off with a putty knife. What little paint was left was sanded off by hand, then a coating of white vinegar was applied and allowed to set. This is a mild acid and actually etches the metal, to give it a "tooth" for subsequent coatings of paint to adhere to.
This was rinsed off and then washed with soap and water and allowed to dry.
Two coats of primer were applied and then two coats of top coat. To give it an old look, I decided to sand the sheen off, then buffed it all down and applied the vinyl. We think it turned out pretty good and wouldn't mind having one like it.
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