The method described is good for a quick temporary treatment; but the coating produced is very thin, and does not wear well; moreover, oil is somewhat destructive to it, which makes it a poor finish for a gun.

Further consideration of plating methods need not be considered here. The plater has and requires equipment not needed by the gunsmith, and costing more than most shops would be justified in investing. If any plating method is selected, it will be found desirable to arrange with a first class plater to do the work on contract, and to allow him to use his own processes with which he is familiar.

BLUING EQUIPMENT: Before going into the solution and heat methods of bluing and browning, we must give a thought to the equipment needed. Fortunately it is simple and inexpensive, yet some equipment is necessary, regardless of the process employed.

The first requisite is a sheer iron tank at least 40 inches long, 5 inches wide, by 6 inches deep. 42 or even 44 inches will be a better length—you can't tell when you're going to want to reblue a long barrel and action, and a tank a little too long is better than one a little too short I This tank is essential whether you use a cold rusting or a hot solution process, for you nftist be able to boil the barrel and make it chemically clean—absolutely free frum any suggestion of grease.

Provide a three burner, or better still, a four burner gas plate or heater; shops located where fuel gas is not available can use a good oil or gasoline cook stove or plate to advantage; better yet, the Coleman Lamp Company, the Sunshine Lamp Companv, the American Gas Machine Company, and others, supply gasolinc-gas burners separately on order. These may be bought at small cost and three or four of them fitted in line into a light frame of angle iron riveted or spot welded together. The fuel supply is kept outside the building, in a 3 or 5-gallon tank with hand pump for pressure, and is earned into the shop through a hollow copper tubing.

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