Automotive Glossary

Automotive Glossary

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S Classification (SAE)

Engine oil suitable for gasoline engines. The second letter in the classification denotes the quality and minimum conditions that the oil must meet.
Entry link: S Classification (SAE)


Safe Weight Limit."
Entry link: S.W.L


Society of automotive engineers. SAE International is the premier membership society dedicated to advancing mobility engineering worldwide. SAE is a global technology information and standards organisation.
Entry link: SAE


Excessive flow on a vertical surface resulting in drips and other imperfections on the painted surface. Can Occur not only when the paint is wet, but also during baking in certain types of paints.
Entry link: Sagging


To smooth a surface with an abrasive paper or cloth.
Entry link: Sand

Sandblasting (grit-blasting)

A method of cleaning metal, usually steel, by applying an abrasive with pressurised air. This is a very efficient method of removing paint and corrosion prior to repainting.
Entry link: Sandblasting (grit-blasting)


A power tool used with abrasives to roughen up or smooth surfaces quickly.
Entry link: Sander

Sanding Block (Rubbing block)

A hard, flexible block to provide a smooth, consistent backing for abrasive papers used in hand sanding.
Entry link: Sanding Block (Rubbing block)

Sandscratch Swelling

Exaggerated distortion of sanding marks in the underlying surface, usually caused by solvents in the topcoat attacking the substrate.
Entry link: Sandscratch Swelling


Tracking in the topcoat of sanding marks in the substrate. Usually caused by either flatting with abrasives that are too coarse, or failure to adequately fill sanding scratches with primer fillers/surfacers
Entry link: Sandscratches

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