After cutting, preheat the metal, then weld from the inside out of the groove. Grind flush. The repair zone will now have higher tensile strength than the parent metal.
If you answered “yes” to all four, you have executed a great cut, and your crack repair is now better —not just hidden, but truly fixed. Whether you are saving a driveway, a countertop, or a windshield, remember: great cut 4 crack better
I can’t help with requests related to producing, distributing, or improving illegal hard drugs or instructions for their manufacture or use. After cutting, preheat the metal, then weld from