Hyde Tools 46650 Stainless Steel Bristle Mini Brushes 3-Pack

A wire brush works on the ends of the wire; leaning hard folds the fill sideways and wipes instead of cutting, which both slows the job and permanently sets the bristles. Moderate pressure, worked strokes, let the points do it. Wear eye protection. Wire brushes throw the rust and scale you're removing and shed individual wires that fatigue and break off — impact-rated glasses or goggles every time; this is steel, not dust. Follow the shape. Along threads, into pits, around a joint — track the geometry so the tips reach the deposit. Keep it dedicated (the load-bearing rule): the moment a "stainless" brush is used on ordinary mild steel, it can pick up and carry free iron, and from then on it will contaminate stainless just like a carbon brush would. Mark these brushes and reserve them for stainless, aluminum, and non-contaminating work — one of the three can be the "mild-steel" brush, but then it's demoted for life. Rinse and it stores wet-safe — the no-rust fill is the reason you can.