Posted by Patterson from gw.wizards.com on October 18, 1999 at 13:31:08:
Awhile back, the topic came up about the back of some straps staining shirts. Somebody (forgive me, I do not remember who) mentioned sealing the leather to keep the dye from running.
Well, I've found a product that works. Its called Leather Sheen, and is made by a company called Fiebings. I purchased it in alocal craft shop. It caost $4.99 for a 6 oz can. I used it on my home-made strap this weekend, and it works like a dream!
Check out their site. Look under "Shoe Care And Leather Care Products"
Cheers!
Patterson