Exterior Glass Cleaning (Pre-Install)

Even on a "clean" car, the exterior of the windows usually has invisible wax residue from past washes, road film and microscopic grit. The interior is typically the priority for film bonding, but exterior contamination affects heat-shrink behaviour.

Standard pre-installation workflow: wash exterior, decontaminate with clay or iron remover if needed, clean interior with de-ionised water and a film-safe cleaner. Total prep time is 30–45 minutes for a typical sedan.

This step is what budget shops skip when they advertise "1-hour full car installs." Quality work doesn't happen at that pace.