I distribute a number of locks around town, and here is one that will be at a coffee shop:
The chain is two feet of 3/8" chain, zinc plated. I realize that the lock is a bit of a weak link, but this is only for daytime use while I'm in ordering a cup of coffee.
My question: How can I cover the chain so that it won't scratch my bike's finish? My wife could knit a sleeve, I could use fabric, or I could get some big, thin-walled tube, for example.
Note that this will sit out in the rain.