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Ok, here are three;


Bondo- polyester/styrene resin which needs a cream-hardener. This two-part mixture is used primarily in automotive body work to repair and smooth dents. It's plastic uncured nature allows for spreading and smoothing until hardening begins. Cures quickly. Sands and paints exceptionally well. The Bondo brand is usually gray resin and red cream hardener. A pinkish/light reddish color results when mixed, indicating the product is ready to apply.


Plywood- MDF


JB Weld- Another two-part product used in many applications. It consists of a cream hardener and a steel-impregnated cream. When these are mixed in even amounts, the aliphatic/polyamine/polyamide/epoxy resin produces a very durable and workable result. Does not conduct electricity, maximum temperature is 600F, and has a tensile strength of 3960 PSI. Strong enough to make minor repairs to motor parts, machinery, etc. Drillable and machineable. Long cure-time. Less strong, but faster curing, is JB Kwik.


Hope this helps.


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