I bought it for 14.95 shipped but, I was just watching a video of some guy researching the patent and it has 20 lbs aluminum oxide (aluminum particles) and like 2 lbs walnut something( you only get 1.5 grams of it tho), all it really is simple aluminum particles + elbow grease, I feel like a smuck for overpaying...
It kinda works, here's pics of 30 min elbow grease and then another 30 min of more elbow grease, I'll do some more later on too