I checked the Rit dye website for information. Nylon needs to be in pretty warm water from what I can see and do. They have a microwave dye process but I think the wife may freek
I didn't even look (Wife still loves me I don't know why)
I'm going to do a couple of things to get started. I think I have an old set in the stash of C-10 crap and see what it takes tp remove the belt for the dye process. Off to the Salvation Army or another thrift store for some soup pots. The wife will notice if hers turn all black
If the belts come appart with reason I may contact an upholstry shop and see what they can do to set new belts into place.