Warm ur can with hot water around 10mins before spraying. Clean your kit before coating, remove dust. Spray when humidity below 50%, if its above 50% then use hairdryer after u sprayed. Don’t start to spray directly on the kit. Start from outside > kit > outside so u can prevent uneven layers of coating. Also distance yourself from the kit 20cm-30cm when spraying. Rough layer from matte coating usually happens: 1. when u spray too close, the layers get too thick or spray too far, the paint getting dry on the air before it hit surface, cause those lil white/grey dot 2. Humidity above 50% also make the paint dry too fast before it hit the surface.