The surface follow metal sheet is flexible vapor deposited sheet.

It achieves a metallic feel like a mirror, and its subtlesiveness. Highly effective for metal representation that couldn't be painted
It is ultra thin, and it stretches to adhere to curved surfaces and can be finished like a mirror.
Also effective for use with clear parts.

Usage
Car model plating or mirror.
Front rim of airplane model main and vertical tail.
The Oleo part of the entire and main leg of the War and current aircraft models.
Apply to the cylinder of character model or the back of the light for added reality, or anywhere you want a mirror-like finish.

(From Amazon.co.jp)