Another Alternative
As another alternative consider this:I liked having my extension greased. As a mater of fact, I find that wheel bearing grease works great on the extension. I have had the trailer 4 years now and the trailer extension is the easiest part on the launching/retrieving process.What I did, though, was pick up a piece of PVC pipe at Home Depot. I think they call it "Drainage Ditch" PVC pipe. It came in, I think, a six foot length, maybe 6 - 8 inches wide and was relatively thin - maybe 1/16 on an inch.When cut lenth wise, a piece could be easily be installed/removed over the greased section of the trailer - protecting it from getting dirty.BTW, when I store my roller furled jib during the winter months, I attach a couple of these pipes together, slip the furled jib inside and hang the entire assembly off a basement wall.Regards, Bob Fliegel