Dish detergent and Oxy clean might work.

It says it's white petroleum and this says how to remove a petroleum jelly stain.
Apparently you can use petroleum to get rid of stains. Oh, cruel irony.

This page even deals with Hog Confinement Odor.
wow.

I'm guessing that hog confinement odor is definitely something you want to remove. Outdoor hogs are bad enough.

i cannot even imagine what that is but i don't want to.

I've done that before. I've also washed and dried clothes with sticks of gum and peppermints. The only real damage came from the gum, which ended with me throwing away a few shirts i think.

HogConfinementOdor just might be my new MeFi sock puppet account name.

I don't know that Chapstick is waxy enough to do this, but I'd consider Chapstick-ing or waxing the entire everything for a complete waxed cotton wardrobe.

You'll never fear the rain again.

[Pronounce that rain agĀn.]

Waxed cotton rules.

At least you won't have to worry about your garments getting dry rot.

*ducks*

ethylene's advice is good, but in my experience, even 91% rubbing alcohol won't be a good enough solvent for removing waxy type products, which have higher paraffin content than petroleum jelly.

"White gas" was the miracle dry cleaning fluid of the early 20th century. It's cheap, and a terrific solvent on most any type of organic fabric (cotton, linen, wool, etc.) The major reason the dry cleaning industry abandoned its use was that it has a very low flash point, which is the same thing as a predilection for exploding when confined in interior spaces.

But you can still safely use it to solve your problem, if you work with it outdoors, don't breathe the fumes, and keep it away from sparks, flames and ignition sources. What you want to do is get some Coleman stove fuel at any camping store place, or even Walmart or Target. You'll also need some white rags or perhaps Viva disposable towels to act as blotting cloths.

Basically, you just use blotting cloths to blot the Coleman fuel on to the spots on your garment, and then use additional fresh, dry blotting cloths to absorb the solvent bearing the grease. The power of capillary action is working for you, and if you use plenty of solvent, and keep blotting enough (10 - 15 "spot and blot" cycle should be plenty), you can get the grease out to any level of clean you'd like.

Test for the colorfastness of any dyes on an inconspicuous area of the garment, before cleaning visible areas. Air the garment outdoors for at least a couple of days after treating it, so that the white gas fumes are completely dissipated before bringing it indoors. Don't substitute other solvents like gasoline, which has identification dyes inserted for tax purposes, and don't mix other solvents like alcohol until the garment has been aired out thoroughly and perhaps water washed again.

I was going to mention Ronson lighter fluid, which should be pretty much the same stuff as white gas or Coleman stove fuel for cleaning purposes. Smoking lamp's out while working with the stuff, natch. Foomp!

Here's a page (scroll to bottom) that heartily recommends "Un-Du candle wax remover", and says that the Chapstick manufacturers recommended it themselves. However, according to Un-du's site, it has been discontinued, sort of... so I don't know if it will still do the trick.

Will dry cleaning work? The solvent they use is good on oil-based stains.