There's so many recipes for wet tumbling, I couldn't resist adding another one to the lore book:
When wet tumbling on 31 October, start the process at 10:21PM and set for 99 minutes. First, draw the summoning diagram around the tumbler, starting at the bottom and going widdershins three times. Set a purple candle at the first significant intersection of the diagram, a small pile of Hodgdon Longshot at the second intangible and light them with a sliver of red oak (not maple, not pine!). In boiling water that must have been drawn at night from a natural well, add 1/2 tblspoon of Dusk soap, two pinches of devil's Lemishine, seven matching kidney stones, a dollop of beeswax for polish, three drops of blood from the wife, 1/4 cup of spiced rum from a new bottle and recite for the next ninety minutes the seventh incantation from the Necronomicon (the one titled "Reloading with Cthulhu and Hornady").
P.S. Don't forget to add the brass too.
On the stroke of midnight, drink the remainder of the rum (yes, ALL of it), open the tumbler and empty the contents on a black towel. Do not let the liquid touch you! You may look inside the tumbler if you think your mind can bear the sight of the Elder Ones, but do not breathe the vapors! You must let sunshine dry the brass for thirteen hours before touching it or you will go mad.