"It's always good to apply paint to really clean surfaces that haven't had time to sit around," he said.

She leaned her hands onto the sleek and clean surface of the president's desk.

The blot stood out like a brand on the clean white surface of his skin.

But Hempel's stories are not about white light or clean, cold surfaces.

A clean surface near home or courtyard is considered as an ideal place for worship.

That way each new patient gets a fresh, clean surface.

He studied the apparently clean surface, then took the knife and went back over several sections.

At the base of those stairs was now a clean, flat surface.

On a clean surface, lay out everything that you need.

Applied to a clean surface, this will protect against deterioration.