PAN Surface Veil: Your Key to Perfect FRP Surfaces PAN Surface Veil is a needled felt made of polyacrylonitrile fibres from Dymriton. Applied in RTM processes:Infusion vacuum , RTM&LRTM. One of Dymriton’s composite surface veils series. PAN Veil, a surface veil for FRP, prevents fibre print through from glass fibres. Used