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A shop that runs both aluminium and steel is a shop where one drum of compound gets used for both, and where the results are inconsistent in a way nobody can explain. The reason is that the two metals want opposite things from the chemistry. Aluminium is amphoteric — it reacts with both acids and […]

“Plexiglass [polishing compound](https://surface-polish.com/consumables_c16)” is a search that assumes the product is a single thing. It is not — plexiglass is a trade name, not a polymer specification, and the same label is used for products that behave differently on the same part. This page is about buying: what the label does and does not tell […]

A wheel is bought for how it looks and specified by roundness. That inversion is what makes wheel polishing a different problem from polishing a flat plate or a bracket, and it is why the process choice is usually made on the wrong criterion. Two constraints sit underneath every wheel job, and neither is about […]

Wheel polishing equipment is usually compared on spindle power and table size, and those two numbers decide the least about what the machine will actually produce. What decides the output is the form: how many spindles, how the part is presented, how it is loaded and unloaded, and whether the unit stands alone or sits […]

Brass is the material where the wrong charge does more damage than the wrong grade — and where the damage appears at the worst possible moment: after the part has been polished. A brass part finished in a charge that has previously run steel comes out looking correct, passes inspection, and then shows rust spots […]

“Deburring-polish.com/blog/deburring-equipment-forms-and-the-tool-boundary/) equipment” covers everything from a file in a fitter’s hand to a floor-standing machine that takes a tonne of parts a shift. Those are not competitors — they sit at different points on two axes, and the purchase decision is about which point the job sits at, not which one is “best”. This page […]

Walnut shell media is the dry charge that works by scrubbing rather than cutting. That single physical difference — no sharp abrasive grain, just a hard irregular body pressed against the surface — explains what it can do, what it cannot, and why it behaves so differently from ceramic or even from its usual partner, […]

A tumbler polisher is bought for one outcome that is usually stated badly: a batch that looks the same. Not “a bright part” — anyone can produce one bright part out of a batch. The spec that matters is whether part one and part four hundred match, and whether next month’s batch matches this month’s. […]

A deburring tumbler removes a burr by cutting it off, not by knocking it loose or peening it over. That single fact explains almost every disappointment: a charge that is too fine will round the part for an hour and leave the burr standing, and a charge that is too coarse will take the burr […]