Now wipe down the area with a damp rag to remove amine blush, which is a water-soluble wax that forms on the surface of cured epoxy. Then, to remove wax, oil, and other contaminants, wipe down the piece of gear and the fasteners with a clean rag moistened with 3M General Purpose Adhesive Cleaner. The power of these contaminants to cause sealant failure shouldn't be underestimated; just watch the rag turn black as you clean the hardware. Finally, apply polyurethane bedding compound to the bottom of the hardware as well as to the fasteners. Here's a trick: Don't apply bedding compound to the parts of the fasteners inside the vessel, such as the washers, nuts, or backing plate; if the exterior bedding fails, you'll know because you'll see water leaking in. If that happens, it's time to rebed. Sealant inside will also tend to trap any water that does leak in, possibly damaging the core.