A dual action (DA) polisher spins the pad while also orbiting it in a figure-eight, and it stalls if you press too hard rather than burning through the paint, which makes it forgiving and the right choice for beginners. A rotary spins the pad on a single axis for maximum cutting power and the fastest correction, but it is far less forgiving and can burn an edge or leave holograms if your technique is off. Forced-rotation (geared) DAs sit in between, giving the safety of an orbit with more consistent cut. With foam pads and a quality polish the final gloss is virtually identical, so the real difference is control and safety, not the shine.

Start with a free-spinning DA. The DAS-6 PRO is a classic entry-level machine, easy to live with and hard to go wrong with, and the Liquid Elements T3200 is another solid first DA. Keep the throw to 15 mm at most; 8 to 9 mm is the most controllable, while a 21 mm long-throw machine runs hotter and is harder on edges, so it is not ideal as a first polisher. It is worth adding a mini or nano polisher such as the Liquid Elements A1000 or ShineMate EX603 for mirrors, pillars and other tight areas the full-size machine cannot reach.

Throw is how far the pad travels from its centre on each oscillation. 8 to 9 mm is the safest, most controllable starting point, 15 mm is the standard all-round size, and 21 mm is an aggressive correction size. A 15 mm machine also copes with curved and contoured panels better than a 21 mm, whose longer throw can momentarily lift the pad at panel edges.

A 5-inch DA handles most panels on a car, while a 3-inch mini or nano polisher earns its place on door mirrors, pillars, bumpers, badges and tight curves where a large pad stalls or cannot sit flat. Professionals usually run both; if you are detailing at home, one full-size DA covers the basics and you can add a mini later.

Always wash, decontaminate and clay the paint first, as polishing over trapped grit just inflicts fresh swirls. Tape up trim and sharp edges, work one small section at a time, and spread the polish on a low speed before correcting at speed 4 to 5. Keep the pad flat, move slowly with roughly 50% overlap on each pass, and never let the machine dwell in one spot. A foam pad with a one-step polish is the easiest first combo, and keep the pad clean as you go. For a full beginner walkthrough, watch Forensic Detailing – How To Polish A Car For Beginners.