I have a couple of questions regarding using a circular saw for bulk matrix removal. First, is it safe to use the circular saw to remove soft matrix from a fossil? Secondly, can I use the saw to shape/slice the matrix or is this best left to another tool? Finally, what do you do to clean up the fossil, once it has been exposed and prepped? For example, let's say I prep a trilo, expose it to my liking and I end up with a bunch of mounds and lines from using the Dremel. What do I use to smooth the bumps and lumps out of the surrounding matrix?