Bondo is for filling and shaping when you need to add more than 1/16 inch thickness. For filling pinholes and coarse sand scratches use polyester putty like Evercoat Easy-Sand. Makes the last step lots easier.k so far ive done the resin and matt coats and sanded between each coats.. now i use bondo to fill in holes.. let it dry... sand it again.. then add primer.. wet sand.. then color and clear coat and wet sand again...correct?