The info-graphic below points out the differences between our coated and non-coated lenses.  All transparent Corvette roofs came from GM with a scratch resistant hard coating.   However, as vehicles age it is nice to have replacement parts that reflect the current value of ones vehicle.  Therefore, we stock an un-coated option for those of you that may not require "restoration correct".

What exactly is a Hard Coating? 

Abrasion resistant hardcoats are formulated using highly durable polysiloxane resins, these ultra thin coatings provide the ultimate in: Protection against scratching & abrasion, preventing chemical attack, optical clarity, outdoor weather protection, graffiti resistance, and ease of cleaning.