Final answer:
If glass is pre-primed for more than 24 hours, assess the condition of the primer. If it's still good, continue. If it's dried or brittle, remove and apply a fresh coat.
Step-by-step explanation:
If glass is pre-primed for more than 24 hours, it is important to assess the condition of the primer before proceeding. Examine the surface to ensure that the primer has not dried fully or become brittle. If the primer is still in good condition, continue with the painting process. However, if the primer has dried or become brittle, it may be necessary to remove it and apply a fresh coat before proceeding.
When removing dried or brittle primer from glass, be careful not to damage the glass surface. Use a paint scraper or sandpaper to gently remove the primer. After the old primer has been removed, clean the glass thoroughly to remove any residue.
Once the surface is clean, reapply a fresh coat of primer and allow it to dry completely before proceeding with painting or any further steps.