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Reply to "welding little cracks"

Thats Flux coated brazing rod used in HVAC business to braze steel pipe to copper tube. Its the correct method but paint will not stick to it even with metal prep. and the flux will definately make the paint bubble. If you have a fine tip oxy acetylene, use a coat hanger or go to the welding supply and buy welding rod for oxy acetylene torch. My 2 cents !! LOL
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