I have primed and applied three coats of Interlux paint to my kayak and still have some flecks that sit slightly proud to the painted surface. I sanded with 320 between coats and cleaned the kayak with water, followed by isopropyl alcohol and lastly a tack rag. The shop has been vaccumed (walls and ceiling also) and the floor washed. I am using an exhaust fan which is vented to the outside since it is Wisconsin in the winter here. Can these imperfections be buffed out? Any other ideas? I am pleased with the paint job otherwise (foam roller with minimal paint followed by a foam brush).