Typicallyfor wax removal I iron between sheets of newsprint for a while, and after most of the wax is gone, send it to a dry cleaners.
Yeah, most of the shibori I do is cotton, I haven't had the budget for much silk lately. I've never used the pipes or the microwave, I've never been able to get a hold of some pvc pipe, however odd that is. Clamps and string are currently my most successful means of shiboi...ing.
Here's one of my batiks, if you want to see.
http://www.deviantart.com/deviation/38739261/?qo=11&q=by%3Ap00p13-p13&qh=sort%3Atime+-in%3Ascrapsbatik needs a bit more equipment than tie-dye or shibori, but the larger amount of control you have over your patterns are worth it, to me anyway.I prefer brushes over tjanting tools, and tjaps (stamps) I'm not too fond of, but that's mostly because I've never been able to use them correctly. Because of the immersion dyeing process, all of your colors must evolve from all the ones before them, which can be restricting at times, but other times it forces you to think of new combinations and steps thaat you sould have never considered with direct application.