Decals and Slivering

Basicly sivering is when air bubbles are trapped beneath your decal after drying. When this happens beneath the clear portions of the decal film, this causes excessive amounts of light to be reflected, hence the term silvering. If you see it, you will not mistake it for anything else.

Here's a nice article from the IPMS Stockholm site on silvering. The third pic shows it clearly.

http://www.ipmsstockholm.org/magazine/2006/10/stuff_eng_benshahar_bf110.htm