flourinated ski wax is a ready made solution but is not cheap. Flouro-powder overlay, which is basically teflon powder, for skis could be mixed with a less expensive wax to make a teflon saturated wax as FBNY suggested. The main thing that keeps skiers from making their own flouro-wax coctail is the outrageous price for teflon in its powder form. To be cost effective one has to buy in extremely large quantities that make it highly impractical to produce for self use. If you still decide to make some, realize that if you heat teflon up past a certain point it produces a vapor that is toxic.

-j