I'm not answering for Brian, but I use a disposable aluminum roasting pan that you buy at the supermarket. One size is very suited to a buttstock and does not require as much acetone to float the stock in. I cover it with aluminum foil crimped snugly all the way around. It may not be necessary but since the wood floats and the top side is not totally submerged I turn it about every 12 hours, or when it's convenient.

Cheap and effective.

SRH

May God bless America and those who defend her.