MBM-021102 Masterbilt Models Mack RD600 Resin Hood Conversion Kit This resin conversion kit from Masterbilt Models requires a "donor" Mack R600 model from Athearn to supply the interior, frame, wheels and other details. Recommended for experienced modelers. We HIGHLY recommend cleaning all resin castings in Westley's Whitewall Tire Bleach before use as preparation for priming/painting.