I am currently trying to restore a #14 Filarmonica Doble Temple that I picked up on eBay. I'm using hard and black Arkansas stones, and having no discernible success. I have had success with a Genco and a C-mon using the same stones. Is there something about the Filarmonica. Also, how can I tell when to move to a finer grit, eg. from the hard Arkansas to the black? Thanks.
Irish