bocephus, here is a cheap easy oven that'll work great for ceracoating barreled actions.

Buy a piece of 8" double walled vent pipe. Next, buy some pipe insulation, a BBQ grill thermostate, an "eye" bolt and a paint can lid. All these items you can buy at Lowes.
Next you need a hotplate and you're in business.

It'll look like this and it'll work great.

The bottom of the 48" vent pipe sits open on top of a hot plate. The thermostate on top tells the tempreture and is adjusted by the heat setting on the hotplate.
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Top, paint can lid with thermostat and eye bolt installed.
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inside, action is hung from eye bolt and hangs in the heated tube.
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Terry