Hi All, I was able to score these round punches for a low price - I try not to buy obvious junk and these look like they could be rescued.  I thought about using my bench top 1x30 belt sander to polish them back to life but before I went and created paper weights, I thought I'd ask here... Can someone point me to a "how to" for sharpening these?  Or possibly someone that can refurb them into working order again? Thanks for the help and inspiration I find here. helps if I incl