- 1). Turn off the heater and allow the register to cool for four to six hours.
- 2). Clean the register with a water-based degreaser. Rinse the register with wet rags. Dry the register with towels.
- 3). Cover areas surrounding the register with masking paper. Tape the masking paper in place with professional painter's tape.
- 4). Coat the heat register with a galvanized-metal-etching spray primer. Hold the can 8 inches from the register as you apply. Wait four hours for the primed register to dry.
- 5). Coat the primed heat register with a high-temperature spray paint. Hold the can 8 inches from the register as you apply. Wait six hours before operating the heater.
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