I got the heater box done today. It didn't go too bad. It helped that I'd already done one before this. A good cleaning in the bath tub and a coat of semi-gloss clear got the box looking good again. I bought a new heater core since it was only $35 but of course it didn't fit well at all. It took some grinding and trimming to get it to work. The metal blower motor plate had a really bad rust spot on it. I put some filler on the bad spot and painted it black.