Would it be safe/feasible to use a butane or propane torch for that? Would there be an issue of carcinogenic residue? If not, then a handheld torch is cheap and

Would it be safe/feasible to use a butane or propane torch for that? Would there be an issue of carcinogenic residue? If not, then a handheld torch is cheap and easy to use, and goes well last 700 degrees.