Well I've been using it for a long time. I had the same problems early on, burn through of the finish and tossing pieces. I changed to 4" wheels instead of the 8. That and changing brands of finish stopped the burn through. Tossing bowls and things simply comes with practice. If you always buff toward an edge it won't grab the work. I also quit using the wax but mostly because it simply didn't seem to add anything. When I do need protection I use Johnson's paste wax.