Wax as a resistant?

It depends on the type of wax you use. The traditional method uses bees wax and parafin, and you need to iron between newspaper to absorb the wax, then boil to get out what is left. Soy wax, however, will wash out in hot water and leave no residue. I have used it for a couple of years now, and it is very easy to work with. Here's what Dharma Trading says about soy wax:

It has a total lack of obnoxious fumes! Other waxes absolutely have to be used in well ventilated areas.
It can be removed from fabric by washing in hot soapy water (over 140 degrees) and won't mess up your plumbing! No boiling, cooling and skimming. No dry cleaning with toxic Perchloroethylene, which fewer and fewer dry cleaners are using anyway.
Unlike other water soluble resists (Inko and Presist), it CAN be submersed if you are careful, using our tips below, so can be used for some more traditional Batik methods with cooler water dyes like our Fiber Reactive.
It does not crackle the same as regular waxes, but (unlike other water soluble resists) it will crack, especially if you stick the waxed item in the freezer.
It comes in flake form, not a solid block like our other waxes, so is easier to measure out and melt just what you need.
The melting temperature range is 110 to 140 F, lower than other waxes, so a double boiler is adequate, no fancy electric pans needed!
Clean up of tools is way easy, and you don't have to set them aside just for using with the wax anymore!
Since it is made from Soy Beans, it is a renewable resource and supports our farmers!