Has it been a success?
No... As i understand it, it will not be used anymore...
As for the topic, as a de-icing sprayer, coordinator, and instructor the last 8 years, i agree with the Mad (Flt) Scientist.
Pouring hot water on the wings is like pissing in your pants. You'll get warm, but not for long, and then you'll be worse off than where you started off..
If DIY de-icing really is your thing, you should at least get some de-icing fluid to mix with the hot water, at a proper ratio...