Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to apply duracoat [title] Cover the surface where you will be working with newspaper. [title] Dis-assemble the entire firearm and clean all pieces thoroughly, making sure there is no trace of oil on any piece. [substeps] One of the best cleaners you can use for this job is mek or methyl ethyl ketone, an industrial solvent.

Ending1: [title] Clean all parts as required : [step] If you have one unaltered piece, you will want to remove it before installing duracoat on your weapon. [title] Cover all parts, but not the whole piece. Ending2: According to citee's, you should wear gloves and a stock dust mask. [title] Set the weapon on a angled surface, preferably the ground. Ending3: It is difficult to reuse sodium bicarbonate because of its carcinogenic properties. [title] Clean off any dirt and cleaning products that may have soaked into the surface. Ending4: Pour mek into a disposable aluminum foil pan and soak the parts. If necessary, use air pressure, brushes or rags to reach every surface of the firearm.

Answer format: ending1/ending2/ending3/ending4