Polymer clay is the same stuff PVC piping is made from...polyvinyl chloride. In order to "cure" properly, it must be fused at the suggested temperature, which is usually around 265º, depending on the brand.
This may sound dumb, but when I was little, the ovens had a light bulb in them for heat...is it still this way? If so, I wouldn't trust it to heat polymer consistently and evenly....so, I wouldn't suggest it for that.
HTH