Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to solder aluminum [title] Identify the alloy if possible. [step] Pure aluminum can be soldered, although it is not an easy metal to work with. Many aluminum objects are actually aluminum alloys.

Ending1: If it's not immediately possible to solder aluminum, start with the parts that are smellier or dirtier and work with the glass or plaster layer that is also covered with alloy. After identifying all of the metals, go to your local hardware store and buy a mercury thermometer, an electronic thermometer, and a power stove. Ending2: Most of these can be soldered the same way, but a few of them are very difficult to work with and may need to be taken to a professional welder. If the aluminum alloy is marked with a letter or number, look it up to see if there are any specific requirements. Ending3: All aluminum alloys are made of brass or titanium and not specifically made for metal to solder. Specific items that are vital to your project may be a stainless steel instrumentation or some common metal ingots. Ending4: [substeps] Every metal object in the us has a alloy that has aluminum qualities. The copper alloy is nothing if not well-mixed and is higher in protein than a single metal object.

Answer format: ending1/ending2/ending3/ending4