has your dewalt got vary speed setting on it, if it hasnt dont use it on your car or you'll be looking at a respray,
for removing swirls autosmart evo fine or r1 as used to be called is purfect for removing swirls,chemical guys do an all in one which i use for light swirls it has sealant and wax in it but i purely use it for scratch n swirl busting;)