Can Dollar Store Tool Bench Hardware Wire be baked in oven?
According to this post, the black and red coloured wires are insulated with plastic:

2 coils at 33 feet wire red plastic insulation
2 coils at 33 feet wire black plastic insulation

Unless you find packages with the regular 'silver' coloured wire - which according to a review here might actually be hard - I suggest using different wires.