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That happened to a buddy of mine. He was baking a passenger car, went downstairs to work on something else. His wife came home to make cookies and raised the oven temp. The car was later sent to a friend to have it re assembled. His house burned down.
I have melted a Walthers H10-44 shell while trying to set Scalecoat. My kids learned all kinds of new words that day.
I keep that shell around so if I start to get cocky it brings me back to reality.
New Hope , MN
Did you consider the model to be "well-done" after the first baking? (Groan!)
On Saturday, April 18, 2020, 2:52:12 PM CDT, BRIAN PAUL EHNI <bpehni@...
In my case, I have to set the oven to 170ºF, because it won’t go any lower. So when it hits 150ºF, I’d put the model in and turn it off.
Many years ago I learned a hard lesson about baking brass models. In conjunction with that lesson I also got to learn how to re-assemble some brass models. After that I still used Mrs. Switzer's oven, but I went about it differently. I now use the following steps:
1. preheat the oven to 150 degrees (I'm not disagreeing with 185 degrees)
2. when the light indicates the oven is at 150 degrees (pre-heat completed) turn it off
4. allow oven to cool and remove models
The bad experience I had may have been a defect in the oven, but I'm not going to find out a second time. I had placed the models in the oven and set it to pre-heat to 150 degrees. It appears that during the pre-heating process the oven went well above 150 to bring the oven to the desired temperature. That temperature was high enough to melt solder.
Soak in lacquer thinner for a couple of hours to remove whatever is on the model.
Run twice in the ultrasonic cleaner, let dry
Spray, from rattle can, Rust-Oleum Primer, SELF ETCHING PRIMER, let dry
Spray with airbrush color of choice.
Bake 1 hour in oven at 185 degrees, leave in oven until cool.