First of all, if you watch the tutorial on YouTube and follow carefully all the steps and tips, it is going to work. It is not easy nor fast, but you can save a little bit of money compare to buying new skins.
That being said, on their product's description, G3 writes to cover the skins with "long sections of old newspaper". Do not attempt that (see results below). Maybe something was wrong with my newspaper (color or not old enough lol), but I guarantee that using Parchment paper is much more effective and painless.
The other thing is that I did one skin, than the other one, so I could learn from my mistakes on the first one.
You can see on the image with the white sheet, that the result was not great. Did I ironed it to long? Did it burned? I really don't know, but it took me an hour just to peel off the glue paper adhesive that stick to it and I was not satisfied about some spots. You can see that my first attempt shows great results, sticky and clean. Will see how long it handles!