I bought a bottle of this awhile back and then lost it in the clutter of my unfinished projects. So I'm just now getting around to trying it. I was not expecting the huge improvement of smoothness of the sprue plate. I decided to try casting fast and hot with just a heavy leather glove on my right hand to open the sprue plate. Once I got going everything was smooth as could be. I opened the sprue plate too early a couple of times but never got any lead smear stuck to the top of the mold.
I should have used this on my Mountain Molds brass blocks. I found it too easy to "Tin" the top of the molds if I got going too fast.
Great stuff
Thanks.