Prepare Trim for Filling

What happens here

After installing trim that comes with a factory-applied protective plastic film (such as Royal PVC trim), identify all the nail holes created by the finish nailer. The crucial part of this technique is to deliberately *leave the protective film on* the trim surface, as this film will serve as a temporary masking layer and a foundation for the excess filler.

Goal: Set up the trim with visible nail holes, ensuring the protective film is intact.