You could use heat shrink tubing, available from any electrical wholesalers in a range of diameters. Comes in both adhesive and non-adhesive, get the non-adhesive if you want to remove for the summer.
Great idea!
Only you need to disassemble the frame to get the heatshrink tube on.
And time travel
@Kimmo started
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You could use heat shrink tubing, available from any electrical wholesalers in a range of diameters. Comes in both adhesive and non-adhesive, get the non-adhesive if you want to remove for the summer.