Berryman offers two different Chem-Dip formulas.  Our professional-strength product comes in 6-gallon cans (part #0905) and will adversely affect many types of rubber and plastic but is completely safe on all metals.    The other Chem-Dip product is intended for general consumer use and comes in 1-gallon paint cans (part #0996).  It is safe on for use on plastic, rubber, and most paints.  While 0996 is also safe for most metals, it can react with some grades of aluminum and aluminum alloys ("pot metal").  0996 will be safe on the nylon parts, but if you use this product on anything aluminum-based, please limit soak times to 30-60 minutes per dip with a maximum soak time of 4 hours.