Today I finished the parts I blasted the other day, including the heater and defroster housings and their fans. The powder I bought from Caswell was virtually the exact color I needed for these parts, and I'm really pleased with how they came out.
I also tested the motors for both the heater and defroster, as well as the NOS motor I purchased, using my rectifier. By setting it at 6 volts, I could spin a motor with as few as 2 amps. As luck would have it, both original motors are still operational, while the NOS motor is not. Still, the originals were a little noisy and weren't too happy turning, so I blasted them with some WD-40, which helped a bit. Since I don't know anything about electric motors, I'll have them rebuilt, including the NOS motor, so I'll have a spare if I ever need it.
The last part of the restoration was testing and restoring the cores. I placed the underseat core in a bucket of soapy water to try to clean off some of the gunk trapped in the fins. I threw the defroster core in the blast cabinet and went over it lightly to just clean off some of the corrosion.
Then I spent about an hour straightening all the fins and tried to make them look correct. I ordered some radiator paint from Eastwood, so once it is painted, nobody will ever see any of the slightly mismatched fins. I also filled it with some of the Rusteco liquid to remove any corrosion inside the core's four tubes and to test for leaks. Hopefully, I'll be able to reassemble everything later this week after I hear from an electric motor rebuilder.
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