What are the white spots and streaks in and on the epoxy layer I´ve applied? Shenzhen Little Sparrow Epoxy Resin

This is called amine blush. It forms when moisture encounters uncured material. You can easily sand it down and then polish the resin back up. To bring your surface to a high gloss, use our sandpaper, found under the equipment tab. Start with a grit of P100 and gradually sand up to a P3,000 grit. If you wish, you can also sand up to a P10,000 grit until you have achieved the desired effect.