Oil

The two of you rush back to the oil puddle where you'd encountered the wolf. Fortunately, the changes are very slow and have hardly advanced before you manage to get back.

"You're further along so you get to go first," Steve offers, and you gladly accept. Pulling off your shoe and sock, you note that your foot no longer looks webbed, now being a rather uniform lump of flesh, slightly flatter, broader, and longer than your original foot. The white discolouration has receded up the leg, beginning at your knee rather than your ankle, but it looks as though it's moved rather than simply disappeared and the one ass cheek that the latex has claimed carries the same creamy white.

Deciding that you've spent more than enough time gawking at it, you stick your foot right into the oil. There's tingling for the first second, and then you see the rubber come to life, wriggling away from your submerged foot and lifting from your leg. Success! You kneel down to dip more of your leg into the puddle and the latex retreats further, letting out a high-pitched and pain-filled screeching.

In just a few more seconds, you'll be able to be latex-free!