If you haven't, don't bother!
I don't care what they say, it doesn't work!
I've been trying for about a month now to do some ATV parts and a trail camera I have. It always comes out like crap. They make it look soooo simple in the videos. Whenever I think I've 'improved' my method from the previous try, it comes out even worse than the last try!
I'm convinced it's all a scam. It does NOT work!