Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to acid etch steel [title] Choose the type of steel you want to etch. [step] You can etch stainless steel, mild steel, or high-carbon steel. Which type of steel you etch will determine the best acid or chemical to use to etch it with.

Ending1: Whatever types of steel you have selected, gather any needed information about the materials and quantity of the acid you use and deduct the amount of the acid you use. [substeps] You can purchase acid etching tools at the local metal store. Ending2: In general, the more acid you use, the more acid you'll need to etch. [substeps] Metal conducts and produces it's uric acid while glass conducts and produces its uric acid. Ending3: Make sure the steel you choose for your acid is formulated for acid etching. Be sure that it's formulated for acid etching and not just for metal or plastic. Ending4: [title] Remove any burrs on the edges of the steel. [step] File away any burrs on the side of the steel you plan to etch with acid.

Answer format: ending1/ending2/ending3/ending4