I bought an unfinished mantel online because it was exactly what I wanted and the price was good. So I primed it with a good primer and I am reading to give it a sanding before I apply the first coat of paint and I am stuck. My beautiful mantel has so many intricate details and I have no clue how to sand in between all those little areas. It must be done because I could see little "fuzzies" and a drip here and there. I realize I should have used a different brush but it is too late now. Any advise?