We have one of those in the shop. It works well for structural items however the cosmetics can leave a lot to be desired. You have to make sure you correctly identify the type of plastic or it will not work at all. Also, you cannot rely on the color of the rods to determine the type of plastic. Trial and error are the only way I know to make that dertimination. Plus you need a way to color the filler, most of them are either clear, white, or black, each being a different type of plastic. Hope this helps.

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Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles