Waterbased polyurethane primer this surface primer can be used directly or mixed with other auxiliary products like varnishes mediums etc it is recomended to avoid mixing surface primer with alcohol andor solvents apply with airbrush or brush this surface primer has a selflevelling matt finish of extraordinary hardness and resistence and does not hide details perfect as a ground for plastic brass resin etc surface primer can be cleaned easily using water for a more thorough cleanin