Disassemble the item to be cleaned as necessary to reach internal areas. Items as large as trucks were frequently dipped in molten Cosmoline so that it would penetrate as much as possible.
Soak small metallic parts in a bucket of mineral spirits. Wipe the Cosmoline away with rags or small brushes. Repeat as needed until the part is clean.
Wipe down larger metal items with a rag dampened with mineral spirits. Replace the rag if it becomes saturated with Cosmoline.
Use a cleaning rod and fabric bore mop inside firearm barrels. Saturate the mop with mineral spirits and clean or change it frequently until all the Cosmoline is removed.
Heat non-metallic items, such wood or rigid plastic, in your oven at its lowest temperature to liquefy the Cosmoline. Don't allow the temperature to reach over 150 degrees. Remove the item and wipe it with a rag, and repeat the process as needed to remove most of the Cosmoline.
Use a mild detergent solution or oil soap on a rag or brush to remove the final traces of Cosmoline from non-metallic items.
Things You Will Need
- Mineral spirits
- Small brush
- Gun cleaning rod and fabric bore mops
- Detergent or oil soap
- Rubber gloves
- Lubricate metal parts after cleaning to prevent rust.