Buffing wheel and jeweler's rouge (white) - Harbor Freight sells a kit for like $6 with 2 different wheels and both red and white rouge, 1/4" arbor. Use a variable speed drill and vise. Or 800/1000 grit sandpaper, wet if you want a really slippery finish.
Big old hunk of wax softened over any kind of flame and rubbed especially up against the stops and for 4-6 inces down will let your wraps slide. Many threads on this subject, you can use everything from suntan lotion to Dr. Bronners, but for lasting effect I've found wax works best, even in 100+ degree temps. Plus you can carry a little piece in your patch kit and renew when needed.