I'd be trying the Shrink Sleeve idea first. I use it quite a bit and when shrunk down it will be quite firm but easy to remove if it's not suitable.
Get a few diameters so you can find one that shrinks the right amount to give an almost flush finish. It may not be the smallest diameter that is most suitable as it thickens as it shrinks of course.
Also cheap .....
$5- $10 per meter at Jaycar !