Clean Pipe Stub and Install New Escutcheon

What happens here

With the old valve removed, carefully take off the existing escutcheon plate, which is often corroded or dirty. Use a utility knife and a scouring pad or emery cloth to meticulously clean the copper pipe stub extending from the wall. This removes any old sealant, corrosion, and debris, ensuring a clean surface for the new valve connection. Finally, slide the new chrome-plated plastic split escutcheon plate onto the copper pipe, positioning it flush against the wall.

Goal: Clean the exposed copper pipe stub thoroughly and then slide the new escutcheon plate into place against the wall.