Use a hack saw or a 4" angle grinder to cut the bulk off of the FSB. Don't waste your time with the Dremel, get a nice little air grinder set up that takes all sorts of different attachments that can be made by any manufacturer. I use something similar to this package below and the small pads work great for grinding down the FSB and giving it a professional look.
This kit is on northern tool for $59.99 and has all the necessary items to get you started.
http://www.northerntool.com/images/p.../157798_lg.jpg
