Here's a link to the best discussion I've seen on edge finishing and burnishing.
http://leatherworker.net/forum/index...howtopic=16609
This link is a tutorial on holster design.
http://leatherworker.net/forum/index.php?showtopic=5696
You don't need a sewing machine to sew holsters. You can hand sew your holsters and it will be as strong or stronger than a machine sewn holster and will look just as nice if well done. The top two holsters I posted pics of as well as the cartridge belt were hand sewn and still look like new after 10+ years of use.
Here's a hand stitching guide.
http://leatherworker.net/forum/index...howtopic=12259
Eugene