Hi i have what might be a noob question. I have been painting about a year and a half now and i am currently doing a basic scuff and paint job. I have sanded everything down with 400 grit then scuffed with red scotch brite. Thats all. My question is some spots i didnt hit with 400 grit as well as others but i scuffed everything with the scotch brite very well. My question is will this create a problem for the areas not sanded as well as others. here is a picture for reference. Obviously the shinny areas are what i am wondering about. thanks for the input. sorry if it sounds confusing