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06-18-2009 #5
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The problem lies in the welded section itself. The metal expands and contracts at different rates allowing the weld seem to show. As you are welding.The seem becomes very ridged and the surrounding metal expands at a quicker rate than the weld seem.
The product you may be thinking of is dynaglass. Yes very hard to sand. Its like liquid fiberglass and filler mix.
Last edited by PRRC; 06-19-2009 at 06:38 AM.
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