I take the used ones, Chance. They don't smell like anything and work just as well. Plus we get to do laundry with them.chance said:Are the bounce sheets unscented? Don't want my shop smelling like one of them french youknowhwat houses. The brasso seems to work and I buy partial cans at garrage sales for a dime or quarter. Normal run time is around 2 hrs. Since I use the el cheapo wally world media I change it regularly and it is amazing how it cuts to down the time the tumbler needs to do the job.