Second this. Why take the risk of abusing a tool designed for different work when there are readily available cheap tools that are more suitable for the job?

If there's only a few cuts to make you can also just use a (metal cutting) handsaw. Hand tools are usually the safest option as they give you much more control and sensitivity/feedback than any power tool. The worst that can happen is a skin deep cut or graze, or a broken blade that is easy to replace. You just need to have a bit of time and a bit of patience.