Set Plastic Sheeting for Protection

What happens here

Next, attach pre-taped plastic sheeting to the blue painter's tape applied in the previous step. Unroll the plastic sheeting, carefully aligning its pre-taped edge with the edge of the blue tape already on the window frame. Press down firmly on the plastic's tape edge to secure it in place. This will provide broad protection for the window glass and any adjacent surfaces from paint overspray or drips.

Goal: Cover and protect the window glass from paint.