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How To Smooth Metal After Welding. Stress-relieving is the process generally specified after welding of most materials. Turn on the welder then hold the torch at a 90-degree angle to the metal.
Parts that are to be painted or otherwise finished after welding may require a secondary grinding operation to smooth welds down to an acceptable level. A rough and well scratched surface will actually help the paint adhere better to the metal than if it were highly finished to a shine. When you buy discs make sure they are for metal not stone.
You can use a grinding wheel to get it done.
Stress-relieving is the process generally specified after welding of most materials. Proper panel forming is paramount. Learn to run a straight bead. Hold it there for a couple of seconds to place a 1 2 in 13 cm wide spot of melted steel wire.