Remove as much spray foam as possible with a scraper or blade, then use a rag dampened with mineral spirits or acetone to clean any remaining residue from the surface.
Unfaced insulation is ideal for new construction, remodels, and interior walls, floors, ceilings, basements, attics, and crawlspaces that do not require moisture control.
Use R-19 or R-21 kraft-faced fiberglass insulation for 2x6 walls to ensure it fits snugly without being too loose or too tightly packed.