Fine Sand for Smoothness & Inspection

What happens here

After wet sanding with the medium-grit sponge, switch to a fine-grit sanding sponge. Lightly dry sand the entire repaired area to achieve an even smoother finish and remove any remaining minor imperfections. The goal is to ensure the surface is perfectly smooth to the touch. Once dry sanded, wipe the area clean with a rag and carefully inspect it. Feel the surface for any remaining ridges, deep pockets, or unevenness that might require further attention.