Very Fine (Red) - General purpose for surface conditioning, transport primer preparation, removal of oxidisation and light rust. Ideal for awkward areas, like door shuts or engine compartments, where traditional papers may tear. Also ideal for commercial vehicles for preparing aluminium panels prior to priming for rivet heads. Ultra Fine (Grey) - Ideal for spot repairs in basecoat and clear paint systems. Use to key surrounding clear lacquer prior to spraying lacquer coat to complete panel and plastic parts.