Originally Posted by
TURIN
If it's got anything more than a light frost on the upper surface GET IT DE-ICED!
The only time I've seen "polished ice" is in the case of very light frost wiped with a cloth until it was basically gone or smooth. Essentially, the new guidance prohibits this action, and light frost will require a de-ice. Deicing is the only sure fire way to go legally, and safely too.