combination with the application of a powdered coating material to the element using electrostatic fluidized bed dip coating methods in conventional processes elements having pores or gaps have to be coated several times for example 3 to 10 times with the necessity of using very thin coatings due to the need for overcoming poor pickup and pinhole formation in contrast the process of the present invention is capable of providing virtually pinhole free uniform coating within a limited time and is therefore valuable for improving industrial productivity the following examples are presented to illustrate and explain more particularly the present invention but it should be understood that the present invention is not limited thereby the 34 parts 34 and 34 percentages 34 indicated in the specification and claims are by weight unless otherwise specified tab type polyester film capacitors were coated with a thermoplastic resin a liquid hardener free epoxy resin epicote 828 shell chemical as an undercoat and then the wet elements were coated with an epoxy resin powdered coating material sumiliteresin pr 52121 sumitomo durez for 10 seconds by electrostatic fluidized bed dip coating after elimination of the powdered coating material deposited on the unnecessary parts by means of a vacuum cleaner the coatings thus obtained were cured at 130 u00b0 c for 1 hour however the completed coating showed ooze of liquid epoxy resin and pinhole formation in 48 elements out of the 50 elements treated in total and moisture protection was insufficient for practical purpose tab type polyester film capacitors were first coated with a mixture of 100 parts of a liquid epoxy resin epicote 828 shell chemical.