Silicon works pretty well I must say, pole slides very nicely, and limits the wear.
I still need to try out engine laquer, and spray the pole with that. That should be even better I think. One of the best things you can do though, to preserve the life of the pole is to keep the pole hose off the ground. Permanently. I think that's wear issue number one. Also keep your hands free from grit and dirt for the above mentioned reason.