I have been using SEAL 1 CLP paste for almost a year now. I was told by a rep I met in person that it would take roughly 3-5 treatments to remove other products and impregnate the metal with this solution. I have been using it on my EDC G19 for a while now and it shows.
In the above image you can see how grimy and dirty the inside of the slide is. That's about 500 rounds worth of dirt since I last cleaned it, same goes for the Barsto barrel.
Above is the breach-face of the barrel, as you can see its pretty dirty.
The dirt on the paper towel is after one wipe, no brushes, no product, nothing other than a single swipe.
Obviously large particles are difficult to remove without a good cleaning, but they come off pretty easily with a single wipe. No photo since I didn't clean it up, I like my guns dirty!
I will continue to use the SEAL 1 CLP paste when I clean my firearms and report back.