Tloomis,
Try Simple Green first, if that doesn't work try some orange GoJo,use a small scrubbrush and take your time ,use light to moderate pressure adn scrub in several directions..meaning go one way,then switch go another,then switch direction.
and last but nor least use Oxy Clean. i work around large oily and heavy type greased machinery and this works for my clothes.
When you have been satisfied with the removal of the grease go and get a bottle of Revivex pre wash and then two bottles of the Revivex water resistant treatment. follow the directions any questions pm me ill be glad to help.
next get online go to the Flyshop and order their wader hanger and always hang your jacket up along with you r waders when your done or when you are storing them till next trip.Never just fold and wad the waders up and throw in a bag they can get compromised easier that way.
I had a wading jacket get Lucas oil treatment on it and this is what saved me from having to buy another rain jacket.The jacket was on the back of my 4runner and fell in a rubbermaid box i keep a murphy proof emergency kit for my vehicle with 2 quarts of oil a bottle of antifreeze extra bug/windsheild wash,wipers,rags,ect.well needless to say i didn't relize the Lucas bottle had fallen over and not all the way but enough to dribble out the oil treatment.Then Murphy struck.I have since learned and hang my waders up all the time..no more surprises.
Tight Wraps & Tight Lines
Rick Wallace
. for those who have smelled gear oil...you know my pain. 
