A Conservator at a museum will clean antique firearms in this manor.
All metal parts are cleaned by applying olive oil and allow the oil to soak and penetrate for one or more days. The metal parts are then brushed with a soft bristled tooth brush to remove any surface contaminates.
The Conservator cleans wooden stocks and parts with a mixture of 50% raw linseed oil and 50% turpentine. A small section of the wood is cleaned at a time by applying the 50/50 mix of linseed oil with a soft lint free cotton cloth. A heat lamp is used to help bring surface contaminates to the surface and to be removed with a dry soft lint free cotton cloth.
No sand paper, no steel wool, no wire brushes, no easy off oven cleaner, no toxic chemicals and god forbid no dish washers.
After cleaning the metal parts have a special CONSERVATION WAX applied to protect the metal from air and moisture.
(oil attracts dirt and dust, dirt and dust absorbs moisture which causes rust)
CONSERVATION WAX | RENAISSANCE WAX POLISH
NOTE: During the American Civil War the triple mix of 1/3 raw linseed oil, 1/3 bees wax and 1/3 turpentine was used as a pre petroleum age cosmoline.
NOTE #2: The same mixture was used by the lady of the house to polish her wooden furniture.
(Pledge wasn't invented yet)
NOTE #3 The same mixture was rubbed on firearms by hunters to give them protection against the elements.
(a raincoat for wood and metal)
And for internal preservation............................