You can repair a cracked metal chair in a few simple steps.
Folding metal chairs are commonly used as dining chairs when additional seating is required. A crack in a metal chair can pinch a person's leg or back and cause the chair to remain structurally unstable until you repair it. You do not have to be a metal welding expert to repair a cracked chair -- a welder would likely burn through the thin metal anyway.
Instructions
1. Sand the surface around the an orbital sander equipped with to remove the enamel paint. Remove the paint around the cracks on both sides of the chair.
2. Create a slight V-groove the full length of the crack on both sides with a rotary tool equipped with a triangle-tipped grinder. Extend the groove past each end of the crack by 1/4 inch. Keep in mind that the metal is relatively thin, so you do not need to make the V-groove very deep.
3. Wipe the paint dust off the chair with a tack cloth.
4. Mix the two-part epoxy putty together and fill both sides of the crack with the filler. Wait 24 hours for the epoxy to dry.
5. Sand the surface of the epoxy putty flat with the surface of the chair. Use the orbital sander and the 800-grit sandpaper to complete this task.
6. Wipe the chair down with a tack cloth to remove dust and dirt.
7. Paint the repaired area with enamel spray paint in a color that matches the color of the chair.
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