I actually used this method when I worked on my stuff and I actually like it. I think I'm going to try hotglue though, but it did work well as long as you did not use too much, but if you used too little it could be a problem. And sometimes its messy, or at least I was just messy with it. But overall I do like it.
And it really is not that cost effective.
The quart of DAP costs 10$ish, but theres a lot in it so you can use it for quite a bit of armor.
You can go to a dollar store and get like, 300 Q-tips for, of course, 1$ and once again, thats more than enough.
For tint, most people have food coloring in their house, and if you don't want to spend the 2$ or whatever it is on it, you really don't need it. It was usefull at first, but then I just started not worrying about it with no problem.
Hairdryer was not necessary at all, I didn't even know I was "supposed" to use one. It dried quickly, sometimes I did have to just let it sit for a minute though.
And the bowl, well I just used leftover food containers and washed em out. Cat food/tuna fish cans were definitely the best, but I also just used random food containers made from plastic. Like a TV dinner or something similar.
But my main helmet was warped so I don't have too much room to talk
But I did enjoy the technique.