i always buff in sunlight to see swirls that are put on with the buffer to do in sun you must be fast. buffing dont remove paint wet sanding does. buffing heats up paint to expell contaminents from the paint. the only paint that is removed is oxidized paint witch should of been wet sanded first as this will clog a pad. when people go threw the paint it called burning the paint most of time its the edges that get burned this is sometimes connfused with removeing paint. its burning the pigment of paint to a clear. yes if you stop buffer while its spinning and leave it there the heat builds up and softens paint and then it gets burned off. as im in sun i can watch swirls come and then i can see them leave when. you hand rub this must be done in shade cause of time it takes to do the wax / compound will harden up in sunlight also for dark paints there is a good product i use for swirls its called plum crazzy and its by MALLICO for dark paints