Before Top Dead Centre

BTDC - Before Top Dead Centre.

The position of the crankshaft before the piston has passed the top of the cylinder and is still on the way up.

British Thermal Units

A technique used to polish an area to remove sanding marks or surface imperfections (see Polishing).

Soft paste containing various grades of fine abrasives suspended in a neutral medium, used to eliminate fine scratches and polish the topcoat.

The amount of paint film deposited on a substrate (the depth or thickness of which is measured in microns).

Substantial structural panel of vehicle body in front of passenger compartment. Also known as a firewall.

A hard hat.

Steering action that results from hitting a bump.