Spray painting electric baseboard heaters is generally not recommended. Electric baseboard heaters can get hot during operation, and using spray paint on them could create a fire hazard or release toxic fumes when the heater heats up.
Additionally, spray painting could interfere with the proper functioning of the heater by blocking vents or affecting the heat distribution. The paint may also peel or chip over time due to the heat, causing a mess and potentially damaging the unit.
If you want to change the color of your electric baseboard heaters, it's best to look for alternative methods such as using heat-resistant paint specifically designed for this purpose or choosing heaters that come in a color or finish that suits your preferences. If you're unsure about how to proceed, it's a good idea to consult the manufacturer's guidelines or seek advice from a professional electrician to ensure safety and proper functioning of the heaters.