In the neck lite coat, out side just enough to make it slick and the acetone is to disolve the wax to keep the media from sticking in side the brass. I submerge it let it set for a few minutes, stirr it around briskley set it on a towel and buy the time you get all the brass out and drain the acetone back in can they are ready to put in your viberator. I will be getting me a Tumbler as soon as UPS decides to deliver it plus the media coming from a different direction I wont have to wash them in the Acetone.