Have a question regarding stock preparation prior to finishing work. Dig, Salopian, Yeti, Yogi, Hansli and all others, how do you approach cleaning old oil stains up before getting on with the finishing? Do you use acetone bathws? Do any of you use some form of sealer on the cleaned wood before starting the finishing process - - this sealer's (eg. cut shellac), purpose being to block the future intrusion of oil again into the wood?