Be careful not to scratch the metal beneath as you cut through the coating with the knife.
If the metal is sticky or gunky, wipe it down with a product like Goo Gone, then wash with soap and water.
You can also aim a heat gun at these spots to dry them more quickly. Hold the gun a few inches away from the metal and move it in small circles or lines so you’re not heating the same spot for too long.
Avoid working outside on a windy or humid day, since this can affect the way the rubber dries. [6] X Research source
Purchase wire at a craft or hardware store. Flexible jewelry wire or picture-hanging wire will work. If you want the entire object coated, consider spraying it rather than dipping it to get more even coverage.
If the metal object will fit into the product’s container, there’s no need to pour it out. If the object is very large or unwieldy, it may be best to spray it rather than dip it.
Hold onto the object by the wire you wrapped around it, or by a part you don’t plan to coat.
Avoid spraying outside on a windy day since the product could wind up on you or nearby objects.
If you’re spraying a car rim, you can wedge playing cards under the edge of the rim all the way around the wheel so you don’t spray the tire. [12] X Research source