Painted rubrails--
For what it's worth, I had the same problem w/my rubrails & decided to do some experimenting before replacement.I Completely sanded the rails w/ 100 grit paper & finished off w/ an alcohol wipe. Afterwards, I brushed on an exterior enamel (in my case, Rustolium brown--three coats, minimum). Let dry for a couple days, then waxed. First time I went to the launch site with it, I was asked where I got the neat wooden rubrail. It was'nt until they got much closer that they realized that it is only paint. I would definitely try to experiment w/various paint and/or colors before tearing it off. Unless the condition of the rail is so deteriorated that it warrents replacement, for a couple of bucks, give it a try. Mine's held up for over three years, now.--- Good luck, and smooth sailing!