Allow it to air dry if necessary. Step 3: Begin to wet-sand the clear coat. The clear coat should be wet-sanded with 400 grit sandpaper. This is to replace the orange peel with finer and finer scratches, which will eventually be filled in with polish. The sanding steps help diminish the clear coat until the entire surface is smooth. Intercoat clear is superior to topcoat clear in this type application. One other note-able application of inter coat clear is its use as a blending agent for custom "fade" jobs or in blending basecoat colors for spot repair. For this type application the intercoat clear is blended with basecoat color to weaken the strength of the basecoat color.