This Re-Glass service is performed on your roof, the acrylic is remove & a new acrylic panel & trim edge are installed. Your frame & weatherstrips are reused. - The upgraded version uses a higher quality Acrylic and features a special Hardcoating like the original GM roof. The Hardcoating protects the acrylic surface from scratching and wear. We back up the quality of this service with a 1 year warranty against material & manufacturing defects. The economy uncoated version is not scratch resistant and carries a 3 month warranty against material & manufacturing defects. - The roof acrylic is available in both tints as originally manufactured. The Blue tint (GM code 24S) has a visable deep blue from the interior & blocks about 93% of the UV light. The Bronze tint (GM code 64S) has a visable lighter bronze tint from the interior & blocks about 82%.