Vermiculite insulation is a pebble-like, pour-in product that is light-brown, gray, or gold, often with shiny flakes or small accordion-like pieces.
Use R-13 or R-15 kraft-faced fiberglass or mineral wool insulation for 2x4 walls to ensure proper insulation.
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.