As a farrier, I will say that I studied for two years prior to taking a 4 week (live in) farrier course. I knew in my head what was right, but knowing and experience are two different things and even with my training, I was admittedly not very good at first. I got good, by studying more and getting under many, many, many horses. If you really want to trim for yourself, take the course (but make sure it is a quality course) and tell your farrier your plans and ask him to help you learn for the next year. He probably won't mind, though he might ask for a bit more money if the lessons take much time, and he can be there to explain everything AND make sure you don't screw up (and help you fix it if you do ^_^)
I don't have a problem with the Riders Rasp. The way it is designed, they make it small, and fine toothed (so no taking off large amounts of wall without a bit of effort) and they are clear about what it is to be used for. It is kind of a good idea, for lost shoes, would reduce chipping a lot until a farrier could get out.
Last edited by Kaioti; 04-22-2010 at 02:14 PM.