Process 4: Ultrasonic Wash - effective even inside small passageways, dull finish (can be enhanced with other techniques)

Uses hot water with additives and ultrasonic energy (abrasive particles are not used BUT it’s possible that components could pick up some). Usually used for machine parts including small components for cleaning prior to inspection prior to refitting. Cleans interior passages (examples: carburettors, complex cylinder heads). A dull finish results with original patina usually little affected. Surfaces can be brightened if required. May adversely affect paint, subject to type.

Stage 1: Pre-soak and pressure wash if there’s loose dirt, grease or other adherents. Dismantle components if required.

Stage 2: If components with oilways or other passages – blow through with compressed air.

Stage 3: Ultrasonic washing to clean interior of passages and all surfaces. This will leave a dull surface retaining the original patina as far as possible. Any stains, resinous deposits or oxidation will remain. Additional treatments are available which may remove these.

Stage 4: Surface brightening if required.

Stage 5: Blow through passages and dry with compressed air. Pack in heavy gauge polythene bag with silica-gel sachet to inhibit corrosion.


Many customers want a ‘best possible’ job, but others do not require this standard which will reduce the cost. For advice or other processes and services available, please phone John on 020 8766 7164.