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Blast furnace body after final assembly and sanding. J-B Weld(TM) epoxy was used to connect the bottom to the midsection; PlasticWeld(TM) bonded the midsection and top pieces, with styrene putty used as filler.

(J-B Weld(TM) is very easy to sand and shape, with virtually zero shrinkage when curing. I would have used it on both seams if I hadn't exhausted my supply!)